Initial update to OpenSim 0.8.2.1 source code.

26 files changed, 5820 insertions, 3927 deletions

diff --git a/ThirdParty/SmartThreadPool/AssemblyInfo.cs b/ThirdParty/SmartThreadPool/AssemblyInfo.cs
deleted file mode 100644
index af9baff..0000000
--- a/ThirdParty/SmartThreadPool/AssemblyInfo.cs
+++ /dev/null
@@ -1,61 +0,0 @@
-using System;
-using System.Reflection;
-using System.Runtime.InteropServices;
-
-//
-// General Information about an assembly is controlled through the following 
-// set of attributes. Change these attribute values to modify the information
-// associated with an assembly.
-//
-[assembly: AssemblyTitle("")]
-[assembly: AssemblyDescription("")]
-[assembly: AssemblyConfiguration("")]
-[assembly: AssemblyCompany("")]
-[assembly: AssemblyProduct("")]
-[assembly: AssemblyCopyright("")]
-[assembly: AssemblyTrademark("")]
-[assembly: AssemblyCulture("")]        
-[assembly: ComVisible(false)]
-[assembly: CLSCompliant(true)]
-
-//
-// Version information for an assembly consists of the following four values:
-//
-//      Major Version
-//      Minor Version 
-//      Build Number
-//      Revision
-//
-// You can specify all the values or you can default the Revision and Build Numbers 
-// by using the '*' as shown below:
-
-[assembly: AssemblyVersion("0.7.5.*")]
-
-//
-// In order to sign your assembly you must specify a key to use. Refer to the 
-// Microsoft .NET Framework documentation for more information on assembly signing.
-//
-// Use the attributes below to control which key is used for signing. 
-//
-// Notes: 
-//   (*) If no key is specified, the assembly is not signed.
-//   (*) KeyName refers to a key that has been installed in the Crypto Service
-//       Provider (CSP) on your machine. KeyFile refers to a file which contains
-//       a key.
-//   (*) If the KeyFile and the KeyName values are both specified, the 
-//       following processing occurs:
-//       (1) If the KeyName can be found in the CSP, that key is used.
-//       (2) If the KeyName does not exist and the KeyFile does exist, the key 
-//           in the KeyFile is installed into the CSP and used.
-//   (*) In order to create a KeyFile, you can use the sn.exe (Strong Name) utility.
-//       When specifying the KeyFile, the location of the KeyFile should be
-//       relative to the project output directory which is
-//       %Project Directory%\obj\<configuration>. For example, if your KeyFile is
-//       located in the project directory, you would specify the AssemblyKeyFile 
-//       attribute as [assembly: AssemblyKeyFile("..\\..\\mykey.snk")]
-//   (*) Delay Signing is an advanced option - see the Microsoft .NET Framework
-//       documentation for more information on this.
-//
-[assembly: AssemblyDelaySign(false)]
-[assembly: AssemblyKeyFile("")]
-[assembly: AssemblyKeyName("")]
diff --git a/ThirdParty/SmartThreadPool/CallerThreadContext.cs b/ThirdParty/SmartThreadPool/CallerThreadContext.cs
index 6ea53f6..e63add5 100644
--- a/ThirdParty/SmartThreadPool/CallerThreadContext.cs
+++ b/ThirdParty/SmartThreadPool/CallerThreadContext.cs
@@ -1,3 +1,6 @@
+
+#if !(_WINDOWS_CE) && !(_SILVERLIGHT) && !(WINDOWS_PHONE)
+
 using System;
 using System.Diagnostics;
 using System.Threading;
@@ -6,218 +9,130 @@ using System.Web;
 using System.Runtime.Remoting.Messaging;
 
 
-namespace Amib.Threading
+namespace Amib.Threading.Internal
 {
-    #region CallerThreadContext class
-
-    /// <summary>
-    /// This class stores the caller call context in order to restore
-    /// it when the work item is executed in the thread pool environment. 
-    /// </summary>
-    internal class CallerThreadContext 
-    {
-        #region Prepare reflection information
-
-        // Cached type information.
-        private static MethodInfo getLogicalCallContextMethodInfo =
-            typeof(Thread).GetMethod("GetLogicalCallContext", BindingFlags.Instance | BindingFlags.NonPublic);
-
-        private static MethodInfo setLogicalCallContextMethodInfo =
-            typeof(Thread).GetMethod("SetLogicalCallContext", BindingFlags.Instance | BindingFlags.NonPublic);
+#region CallerThreadContext class
 
-        private static string HttpContextSlotName = GetHttpContextSlotName();
+        /// <summary>
+        /// This class stores the caller call context in order to restore
+        /// it when the work item is executed in the thread pool environment. 
+        /// </summary>
+        internal class CallerThreadContext 
+        {
+#region Prepare reflection information
 
-        private static string GetHttpContextSlotName()
-        {
-            FieldInfo fi = typeof(HttpContext).GetField("CallContextSlotName", BindingFlags.Static | BindingFlags.NonPublic);
+                // Cached type information.
+                private static readonly MethodInfo getLogicalCallContextMethodInfo =
+                        typeof(Thread).GetMethod("GetLogicalCallContext", BindingFlags.Instance | BindingFlags.NonPublic);
 
-            if( fi != null )
-                return (string)fi.GetValue(null);
-            else // Use the default "HttpContext" slot name
-                return "HttpContext";
-        }
+                private static readonly MethodInfo setLogicalCallContextMethodInfo =
+                        typeof(Thread).GetMethod("SetLogicalCallContext", BindingFlags.Instance | BindingFlags.NonPublic);
 
-        #endregion
-
-        #region Private fields
-
-        private HttpContext _httpContext = null;
-        private LogicalCallContext _callContext = null;
-
-        #endregion
+                private static string HttpContextSlotName = GetHttpContextSlotName();
 
-        /// <summary>
-        /// Constructor
-        /// </summary>
-        private CallerThreadContext()
-        {
-        }
+                private static string GetHttpContextSlotName()
+                {
+                        FieldInfo fi = typeof(HttpContext).GetField("CallContextSlotName", BindingFlags.Static | BindingFlags.NonPublic);
 
-        public bool CapturedCallContext
-        {
-            get
+            if (fi != null)
             {
-                return (null != _callContext);
+                return (string) fi.GetValue(null);
             }
-        }
 
-        public bool CapturedHttpContext
-        {
-            get
-            {
-                return (null != _httpContext);
-            }
-        }
-
-        /// <summary>
-        /// Captures the current thread context
-        /// </summary>
-        /// <returns></returns>
-        public static CallerThreadContext Capture(
-            bool captureCallContext, 
-            bool captureHttpContext)
-        {
-            Debug.Assert(captureCallContext || captureHttpContext);
-
-            CallerThreadContext callerThreadContext = new CallerThreadContext();
-
-            // TODO: In NET 2.0, redo using the new feature of ExecutionContext class - Capture()
-            // Capture Call Context
-            if(captureCallContext && (getLogicalCallContextMethodInfo != null))
-            {
-                callerThreadContext._callContext = (LogicalCallContext)getLogicalCallContextMethodInfo.Invoke(Thread.CurrentThread, null);
-                if (callerThreadContext._callContext != null)
-                {
-                    callerThreadContext._callContext = (LogicalCallContext)callerThreadContext._callContext.Clone();
-                }
-            }
-
-            // Capture httpContext
-            if (captureHttpContext && (null != HttpContext.Current))
-            {
-                callerThreadContext._httpContext = HttpContext.Current;
-            }
-
-            return callerThreadContext;
-        }
+                    return "HttpContext";
+                }
 
-        /// <summary>
-        /// Applies the thread context stored earlier
-        /// </summary>
-        /// <param name="callerThreadContext"></param>
-        public static void Apply(CallerThreadContext callerThreadContext)
-        {
-            if (null == callerThreadContext) 
-            {
-                throw new ArgumentNullException("callerThreadContext");            
-            }
-
-            // Todo: In NET 2.0, redo using the new feature of ExecutionContext class - Run()
-            // Restore call context
-            if ((callerThreadContext._callContext != null) && (setLogicalCallContextMethodInfo != null))
-            {
-                setLogicalCallContextMethodInfo.Invoke(Thread.CurrentThread, new object[] { callerThreadContext._callContext });
-            }
-
-            // Restore HttpContext 
-            if (callerThreadContext._httpContext != null)
-            {
-                CallContext.SetData(HttpContextSlotName, callerThreadContext._httpContext);
-            }
-        }
-    }
-
-    #endregion
-
-}
+        #endregion
 
+#region Private fields
 
-/*
-// Ami Bar
-// amibar@gmail.com
+                private HttpContext _httpContext;
+                private LogicalCallContext _callContext;
 
-using System;
-using System.Threading;
-using System.Globalization;
-using System.Security.Principal;
-using System.Reflection;
-using System.Runtime.Remoting.Contexts;
+        #endregion
 
-namespace Amib.Threading.Internal
-{
-    #region CallerThreadContext class
-
-    /// <summary>
-    /// This class stores the caller thread context in order to restore
-    /// it when the work item is executed in the context of the thread 
-    /// from the pool.
-    /// Note that we can't store the thread's CompressedStack, because 
-    /// it throws a security exception
-    /// </summary>
-    public class CallerThreadContext
-    {
-        private CultureInfo _culture = null;
-        private CultureInfo _cultureUI = null;
-        private IPrincipal _principal;
-        private System.Runtime.Remoting.Contexts.Context _context;
-
-        private static FieldInfo _fieldInfo = GetFieldInfo();
-
-        private static FieldInfo GetFieldInfo()
-        {
-            Type threadType = typeof(Thread);
-            return threadType.GetField(
-                "m_Context",
-                BindingFlags.Instance | BindingFlags.NonPublic);
-        }
-
-        /// <summary>
-        /// Constructor
-        /// </summary>
-        private CallerThreadContext()
-        {
-        }
-
-        /// <summary>
-        /// Captures the current thread context
-        /// </summary>
-        /// <returns></returns>
-        public static CallerThreadContext Capture()
-        {
-            CallerThreadContext callerThreadContext = new CallerThreadContext();
-
-            Thread thread = Thread.CurrentThread;
-            callerThreadContext._culture = thread.CurrentCulture;
-            callerThreadContext._cultureUI = thread.CurrentUICulture;
-            callerThreadContext._principal = Thread.CurrentPrincipal;
-            callerThreadContext._context = Thread.CurrentContext;
-            return callerThreadContext;
-        }
-
-        /// <summary>
-        /// Applies the thread context stored earlier
-        /// </summary>
-        /// <param name="callerThreadContext"></param>
-        public static void Apply(CallerThreadContext callerThreadContext)
-        {
-            Thread thread = Thread.CurrentThread;
-            thread.CurrentCulture = callerThreadContext._culture;
-            thread.CurrentUICulture = callerThreadContext._cultureUI;
-            Thread.CurrentPrincipal = callerThreadContext._principal;
-
-            // Uncomment the following block to enable the Thread.CurrentThread
-/*
-            if (null != _fieldInfo)
-            {
-                _fieldInfo.SetValue(
-                    Thread.CurrentThread, 
-                    callerThreadContext._context);
-            }
-* /            
-        }
-    }
+                /// <summary>
+                /// Constructor
+                /// </summary>
+                private CallerThreadContext()
+                {
+                }
+
+                public bool CapturedCallContext
+                {
+                        get
+                        {
+                                return (null != _callContext);
+                        }
+                }
+
+                public bool CapturedHttpContext
+                {
+                        get
+                        {
+                                return (null != _httpContext);
+                        }
+                }
+
+                /// <summary>
+                /// Captures the current thread context
+                /// </summary>
+                /// <returns></returns>
+                public static CallerThreadContext Capture(
+                        bool captureCallContext, 
+                        bool captureHttpContext)
+                {
+                        Debug.Assert(captureCallContext || captureHttpContext);
+
+                        CallerThreadContext callerThreadContext = new CallerThreadContext();
+
+                        // TODO: In NET 2.0, redo using the new feature of ExecutionContext class - Capture()
+                        // Capture Call Context
+                        if(captureCallContext && (getLogicalCallContextMethodInfo != null))
+                        {
+                                callerThreadContext._callContext = (LogicalCallContext)getLogicalCallContextMethodInfo.Invoke(Thread.CurrentThread, null);
+                                if (callerThreadContext._callContext != null)
+                                {
+                                        callerThreadContext._callContext = (LogicalCallContext)callerThreadContext._callContext.Clone();
+                                }
+                        }
+
+                        // Capture httpContext
+                        if (captureHttpContext && (null != HttpContext.Current))
+                        {
+                                callerThreadContext._httpContext = HttpContext.Current;
+                        }
+
+                        return callerThreadContext;
+                }
+
+                /// <summary>
+                /// Applies the thread context stored earlier
+                /// </summary>
+                /// <param name="callerThreadContext"></param>
+                public static void Apply(CallerThreadContext callerThreadContext)
+                {
+                        if (null == callerThreadContext) 
+                        {
+                                throw new ArgumentNullException("callerThreadContext");                 
+                        }
+
+                        // Todo: In NET 2.0, redo using the new feature of ExecutionContext class - Run()
+                        // Restore call context
+                        if ((callerThreadContext._callContext != null) && (setLogicalCallContextMethodInfo != null))
+                        {
+                                setLogicalCallContextMethodInfo.Invoke(Thread.CurrentThread, new object[] { callerThreadContext._callContext });
+                        }
+
+                        // Restore HttpContext 
+                        if (callerThreadContext._httpContext != null)
+                        {
+                HttpContext.Current = callerThreadContext._httpContext;
+                                //CallContext.SetData(HttpContextSlotName, callerThreadContext._httpContext);
+                        }
+                }
+        }
 
     #endregion
 }
-*/
-
+#endif
diff --git a/ThirdParty/SmartThreadPool/CanceledWorkItemsGroup.cs b/ThirdParty/SmartThreadPool/CanceledWorkItemsGroup.cs
new file mode 100644
index 0000000..5752957
--- /dev/null
+++ b/ThirdParty/SmartThreadPool/CanceledWorkItemsGroup.cs
@@ -0,0 +1,14 @@
+namespace Amib.Threading.Internal
+{
+    internal class CanceledWorkItemsGroup
+    {
+        public readonly static CanceledWorkItemsGroup NotCanceledWorkItemsGroup = new CanceledWorkItemsGroup();
+
+        public CanceledWorkItemsGroup()
+        {
+            IsCanceled = false;
+        }
+
+        public bool IsCanceled { get; set; }
+    }
+}
\ No newline at end of file
diff --git a/ThirdParty/SmartThreadPool/EventWaitHandle.cs b/ThirdParty/SmartThreadPool/EventWaitHandle.cs
new file mode 100644
index 0000000..25be07a
--- /dev/null
+++ b/ThirdParty/SmartThreadPool/EventWaitHandle.cs
@@ -0,0 +1,104 @@
+#if (_WINDOWS_CE)
+
+using System;
+using System.Runtime.InteropServices;
+using System.Threading;
+
+namespace Amib.Threading.Internal
+{
+    /// <summary>
+    /// EventWaitHandle class
+    /// In WindowsCE this class doesn't exist and I needed the WaitAll and WaitAny implementation.
+    /// So I wrote this class to implement these two methods with some of their overloads.
+    /// It uses the WaitForMultipleObjects API to do the WaitAll and WaitAny.
+    /// Note that this class doesn't even inherit from WaitHandle!
+    /// </summary>
+    public class STPEventWaitHandle
+    {
+        #region Public Constants
+
+        public const int WaitTimeout = Timeout.Infinite;
+
+        #endregion
+
+        #region Private External Constants
+
+        private const Int32 WAIT_FAILED = -1;
+        private const Int32 WAIT_TIMEOUT = 0x102;
+        private const UInt32 INFINITE = 0xFFFFFFFF;
+
+        #endregion
+
+        #region WaitAll and WaitAny
+
+        internal static bool WaitOne(WaitHandle waitHandle, int millisecondsTimeout, bool exitContext)
+        {
+            return waitHandle.WaitOne(millisecondsTimeout, exitContext);
+        }
+
+            private static IntPtr[] PrepareNativeHandles(WaitHandle[] waitHandles)
+            {
+                IntPtr[] nativeHandles = new IntPtr[waitHandles.Length];
+                for (int i = 0; i < waitHandles.Length; i++)
+                {
+                nativeHandles[i] = waitHandles[i].Handle;
+                }
+                return nativeHandles;
+            }
+
+            public static bool WaitAll(WaitHandle[] waitHandles, int millisecondsTimeout, bool exitContext)
+            {
+            uint timeout = millisecondsTimeout < 0 ? INFINITE : (uint)millisecondsTimeout;
+
+            IntPtr[] nativeHandles = PrepareNativeHandles(waitHandles);
+
+                int result = WaitForMultipleObjects((uint)waitHandles.Length, nativeHandles, true, timeout);
+
+            if (result == WAIT_TIMEOUT || result == WAIT_FAILED)
+            {
+                return false;
+            }
+
+                return true;
+            }
+
+
+            public static int WaitAny(WaitHandle[] waitHandles, int millisecondsTimeout, bool exitContext)
+        {
+            uint timeout = millisecondsTimeout < 0 ? INFINITE : (uint)millisecondsTimeout;
+
+            IntPtr[] nativeHandles = PrepareNativeHandles(waitHandles);
+
+            int result = WaitForMultipleObjects((uint)waitHandles.Length, nativeHandles, false, timeout);
+
+            if (result >= 0 && result < waitHandles.Length)
+            {
+                return result;
+            }
+
+            return -1;
+        }
+
+        public static int WaitAny(WaitHandle[] waitHandles)
+        {
+            return WaitAny(waitHandles, Timeout.Infinite, false);
+        }
+
+        public static int WaitAny(WaitHandle[] waitHandles, TimeSpan timeout, bool exitContext)
+        {
+            int millisecondsTimeout = (int)timeout.TotalMilliseconds;
+
+            return WaitAny(waitHandles, millisecondsTimeout, false);
+        }
+ 
+        #endregion
+
+        #region External methods
+
+        [DllImport("coredll.dll", SetLastError = true)]
+        public static extern int WaitForMultipleObjects(uint nCount, IntPtr[] lpHandles, bool fWaitAll, uint dwMilliseconds);
+
+        #endregion
+    }
+}
+#endif
\ No newline at end of file
diff --git a/ThirdParty/SmartThreadPool/EventWaitHandleFactory.cs b/ThirdParty/SmartThreadPool/EventWaitHandleFactory.cs
new file mode 100644
index 0000000..3c9c849
--- /dev/null
+++ b/ThirdParty/SmartThreadPool/EventWaitHandleFactory.cs
@@ -0,0 +1,82 @@
+using System.Threading;
+
+#if (_WINDOWS_CE)
+using System;
+using System.Runtime.InteropServices;
+#endif
+
+namespace Amib.Threading.Internal
+{
+    /// <summary>
+    /// EventWaitHandleFactory class.
+    /// This is a static class that creates AutoResetEvent and ManualResetEvent objects.
+    /// In WindowCE the WaitForMultipleObjects API fails to use the Handle property 
+    /// of XxxResetEvent. It can use only handles that were created by the CreateEvent API.
+    /// Consequently this class creates the needed XxxResetEvent and replaces the handle if
+    /// it's a WindowsCE OS.
+    /// </summary>
+    public static class EventWaitHandleFactory
+    {
+        /// <summary>
+        /// Create a new AutoResetEvent object
+        /// </summary>
+        /// <returns>Return a new AutoResetEvent object</returns>
+        public static AutoResetEvent CreateAutoResetEvent()
+        {
+            AutoResetEvent waitHandle = new AutoResetEvent(false);
+
+#if (_WINDOWS_CE)
+            ReplaceEventHandle(waitHandle, false, false);
+#endif
+
+            return waitHandle;
+        }
+
+        /// <summary>
+        /// Create a new ManualResetEvent object
+        /// </summary>
+        /// <returns>Return a new ManualResetEvent object</returns>
+        public static ManualResetEvent CreateManualResetEvent(bool initialState)
+        {
+            ManualResetEvent waitHandle = new ManualResetEvent(initialState);
+
+#if (_WINDOWS_CE)
+            ReplaceEventHandle(waitHandle, true, initialState);
+#endif
+
+            return waitHandle;
+        }
+
+#if (_WINDOWS_CE)
+
+        /// <summary>
+        /// Replace the event handle
+        /// </summary>
+        /// <param name="waitHandle">The WaitHandle object which its handle needs to be replaced.</param>
+        /// <param name="manualReset">Indicates if the event is a ManualResetEvent (true) or an AutoResetEvent (false)</param>
+        /// <param name="initialState">The initial state of the event</param>
+        private static void ReplaceEventHandle(WaitHandle waitHandle, bool manualReset, bool initialState)
+        {
+            // Store the old handle 
+            IntPtr oldHandle = waitHandle.Handle;
+
+            // Create a new event
+            IntPtr newHandle = CreateEvent(IntPtr.Zero, manualReset, initialState, null);
+
+            // Replace the old event with the new event
+            waitHandle.Handle = newHandle;
+
+            // Close the old event
+            CloseHandle (oldHandle);        
+        }
+
+        [DllImport("coredll.dll", SetLastError = true)]
+        public static extern IntPtr CreateEvent(IntPtr lpEventAttributes, bool bManualReset, bool bInitialState, string lpName);
+
+        //Handle
+        [DllImport("coredll.dll", SetLastError = true)]
+        public static extern bool CloseHandle(IntPtr hObject);
+#endif
+
+    }
+}
diff --git a/ThirdParty/SmartThreadPool/Exceptions.cs b/ThirdParty/SmartThreadPool/Exceptions.cs
index c454709..6c6a88b 100644
--- a/ThirdParty/SmartThreadPool/Exceptions.cs
+++ b/ThirdParty/SmartThreadPool/Exceptions.cs
@@ -1,8 +1,7 @@
-// Ami Bar
-// amibar@gmail.com
-
 using System;
+#if !(_WINDOWS_CE)
 using System.Runtime.Serialization;
+#endif
 
 namespace Amib.Threading
 {
@@ -11,22 +10,39 @@ namespace Amib.Threading
     /// <summary>
     /// Represents an exception in case IWorkItemResult.GetResult has been canceled
     /// </summary>
-    [Serializable]
-    public sealed class WorkItemCancelException : ApplicationException
+    public sealed partial class WorkItemCancelException : Exception
     {
-        public WorkItemCancelException() : base()
+        public WorkItemCancelException()
         {
         }
 
-        public WorkItemCancelException(string message) : base(message)
+        public WorkItemCancelException(string message)
+            : base(message)
         {
         }
 
-        public WorkItemCancelException(string message, Exception e) : base(message, e)
+        public WorkItemCancelException(string message, Exception e)
+            : base(message, e)
         {
         }
+    }
 
-        public WorkItemCancelException(SerializationInfo si, StreamingContext sc) : base(si, sc)
+    /// <summary>
+    /// Represents an exception in case IWorkItemResult.GetResult has been timed out
+    /// </summary>
+    public sealed partial class WorkItemTimeoutException : Exception
+    {
+        public WorkItemTimeoutException()
+        {
+        }
+
+        public WorkItemTimeoutException(string message)
+            : base(message)
+        {
+        }
+
+        public WorkItemTimeoutException(string message, Exception e)
+            : base(message, e)
         {
         }
     }
@@ -34,22 +50,33 @@ namespace Amib.Threading
     /// <summary>
     /// Represents an exception in case IWorkItemResult.GetResult has been timed out
     /// </summary>
-    [Serializable]
-    public sealed class WorkItemTimeoutException : ApplicationException
+    public sealed partial class WorkItemResultException : Exception
     {
-        public WorkItemTimeoutException() : base()
+        public WorkItemResultException()
         {
         }
 
-        public WorkItemTimeoutException(string message) : base(message)
+        public WorkItemResultException(string message)
+            : base(message)
         {
         }
 
-        public WorkItemTimeoutException(string message, Exception e) : base(message, e)
+        public WorkItemResultException(string message, Exception e)
+            : base(message, e)
         {
         }
+    }
 
-        public WorkItemTimeoutException(SerializationInfo si, StreamingContext sc) : base(si, sc)
+
+#if !(_WINDOWS_CE) && !(_SILVERLIGHT) && !(WINDOWS_PHONE)
+    /// <summary>
+    /// Represents an exception in case IWorkItemResult.GetResult has been canceled
+    /// </summary>
+    [Serializable]
+    public sealed partial class WorkItemCancelException
+    {
+        public WorkItemCancelException(SerializationInfo si, StreamingContext sc)
+            : base(si, sc)
         {
         }
     }
@@ -58,24 +85,27 @@ namespace Amib.Threading
     /// Represents an exception in case IWorkItemResult.GetResult has been timed out
     /// </summary>
     [Serializable]
-    public sealed class WorkItemResultException : ApplicationException
+    public sealed partial class WorkItemTimeoutException
     {
-        public WorkItemResultException() : base()
-        {
-        }
-
-        public WorkItemResultException(string message) : base(message)
-        {
-        }
-
-        public WorkItemResultException(string message, Exception e) : base(message, e)
+        public WorkItemTimeoutException(SerializationInfo si, StreamingContext sc)
+            : base(si, sc)
         {
         }
+    }
 
-        public WorkItemResultException(SerializationInfo si, StreamingContext sc) : base(si, sc)
+    /// <summary>
+    /// Represents an exception in case IWorkItemResult.GetResult has been timed out
+    /// </summary>
+    [Serializable]
+    public sealed partial class WorkItemResultException
+    {
+        public WorkItemResultException(SerializationInfo si, StreamingContext sc)
+            : base(si, sc)
         {
         }
     }
 
+#endif
+
     #endregion
 }
diff --git a/ThirdParty/SmartThreadPool/Interfaces.cs b/ThirdParty/SmartThreadPool/Interfaces.cs
index f1c1fcf..513422f 100644
--- a/ThirdParty/SmartThreadPool/Interfaces.cs
+++ b/ThirdParty/SmartThreadPool/Interfaces.cs
@@ -1,271 +1,628 @@
-// Ami Bar
-// amibar@gmail.com
-
 using System;
 using System.Threading;
 
 namespace Amib.Threading
 {
-    #region Delegates
+        #region Delegates
+
+        /// <summary>
+        /// A delegate that represents the method to run as the work item
+        /// </summary>
+        /// <param name="state">A state object for the method to run</param>
+        public delegate object WorkItemCallback(object state);
+
+        /// <summary>
+        /// A delegate to call after the WorkItemCallback completed
+        /// </summary>
+        /// <param name="wir">The work item result object</param>
+    public delegate void PostExecuteWorkItemCallback(IWorkItemResult wir);
 
     /// <summary>
-    /// A delegate that represents the method to run as the work item
+    /// A delegate to call after the WorkItemCallback completed
     /// </summary>
-    /// <param name="state">A state object for the method to run</param>
-    public delegate object WorkItemCallback(object state);
+    /// <param name="wir">The work item result object</param>
+    public delegate void PostExecuteWorkItemCallback<TResult>(IWorkItemResult<TResult> wir);
+
+        /// <summary>
+        /// A delegate to call when a WorkItemsGroup becomes idle
+        /// </summary>
+        /// <param name="workItemsGroup">A reference to the WorkItemsGroup that became idle</param>
+        public delegate void WorkItemsGroupIdleHandler(IWorkItemsGroup workItemsGroup);
 
     /// <summary>
-    /// A delegate to call after the WorkItemCallback completed
+    /// A delegate to call after a thread is created, but before 
+    /// it's first use.
     /// </summary>
-    /// <param name="wir">The work item result object</param>
-    public delegate void PostExecuteWorkItemCallback(IWorkItemResult wir);
+    public delegate void ThreadInitializationHandler();
 
     /// <summary>
-    /// A delegate to call when a WorkItemsGroup becomes idle
+    /// A delegate to call when a thread is about to exit, after 
+    /// it is no longer belong to the pool.
     /// </summary>
-    /// <param name="workItemsGroup">A reference to the WorkItemsGroup that became idle</param>
-    public delegate void WorkItemsGroupIdleHandler(IWorkItemsGroup workItemsGroup);
+    public delegate void ThreadTerminationHandler();
 
-    #endregion
+        #endregion
 
-    #region WorkItem Priority
+        #region WorkItem Priority
 
-    public enum WorkItemPriority
-    {
-        Lowest,
-        BelowNormal,
-        Normal,
-        AboveNormal,
-        Highest,
-    }
+    /// <summary>
+    /// Defines the availeable priorities of a work item.
+    /// The higher the priority a work item has, the sooner
+    /// it will be executed.
+    /// </summary>
+        public enum WorkItemPriority
+        {
+                Lowest,
+                BelowNormal,
+                Normal,
+                AboveNormal,
+                Highest,
+        }
+
+        #endregion
+
+        #region IWorkItemsGroup interface 
+
+        /// <summary>
+        /// IWorkItemsGroup interface
+    /// Created by SmartThreadPool.CreateWorkItemsGroup()
+        /// </summary>
+        public interface IWorkItemsGroup
+        {
+                /// <summary>
+                /// Get/Set the name of the WorkItemsGroup
+                /// </summary>
+                string Name { get; set; }
 
-    #endregion
+        /// <summary>
+        /// Get/Set the maximum number of workitem that execute cocurrency on the thread pool
+        /// </summary>
+        int Concurrency { get; set; }
+
+        /// <summary>
+        /// Get the number of work items waiting in the queue.
+        /// </summary>
+        int WaitingCallbacks { get; }
 
-    #region IHasWorkItemPriority interface 
+        /// <summary>
+        /// Get an array with all the state objects of the currently running items.
+        /// The array represents a snap shot and impact performance.
+        /// </summary>
+        object[] GetStates();
 
-    public interface IHasWorkItemPriority
-    {
-        WorkItemPriority WorkItemPriority { get; }
-    }
+        /// <summary>
+        /// Get the WorkItemsGroup start information
+        /// </summary>
+        WIGStartInfo WIGStartInfo { get; }
 
-    #endregion
+        /// <summary>
+        /// Starts to execute work items
+        /// </summary>
+        void Start();
 
-    #region IWorkItemsGroup interface 
+        /// <summary>
+        /// Cancel all the work items.
+        /// Same as Cancel(false)
+        /// </summary>
+        void Cancel();
 
-    /// <summary>
-    /// IWorkItemsGroup interface
-    /// </summary>
-    public interface IWorkItemsGroup
-    {
         /// <summary>
-        /// Get/Set the name of the WorkItemsGroup
+        /// Cancel all work items using thread abortion
         /// </summary>
-        string Name { get; set; }
+        /// <param name="abortExecution">True to stop work items by raising ThreadAbortException</param>
+        void Cancel(bool abortExecution);
 
+        /// <summary>
+        /// Wait for all work item to complete.
+        /// </summary>
+                void WaitForIdle();
+
+        /// <summary>
+        /// Wait for all work item to complete, until timeout expired
+        /// </summary>
+        /// <param name="timeout">How long to wait for the work items to complete</param>
+        /// <returns>Returns true if work items completed within the timeout, otherwise false.</returns>
+                bool WaitForIdle(TimeSpan timeout);
+
+        /// <summary>
+        /// Wait for all work item to complete, until timeout expired
+        /// </summary>
+        /// <param name="millisecondsTimeout">How long to wait for the work items to complete in milliseconds</param>
+        /// <returns>Returns true if work items completed within the timeout, otherwise false.</returns>
+        bool WaitForIdle(int millisecondsTimeout);
+
+        /// <summary>
+        /// IsIdle is true when there are no work items running or queued.
+        /// </summary>
+        bool IsIdle { get; }
+
+        /// <summary>
+        /// This event is fired when all work items are completed.
+        /// (When IsIdle changes to true)
+        /// This event only work on WorkItemsGroup. On SmartThreadPool
+        /// it throws the NotImplementedException.
+        /// </summary>
+        event WorkItemsGroupIdleHandler OnIdle;
+
+        #region QueueWorkItem
+
+        /// <summary>
+        /// Queue a work item
+        /// </summary>
+        /// <param name="callback">A callback to execute</param>
+        /// <returns>Returns a work item result</returns>        
         IWorkItemResult QueueWorkItem(WorkItemCallback callback);
+
+        /// <summary>
+        /// Queue a work item
+        /// </summary>
+        /// <param name="callback">A callback to execute</param>
+        /// <param name="workItemPriority">The priority of the work item</param>
+        /// <returns>Returns a work item result</returns>
         IWorkItemResult QueueWorkItem(WorkItemCallback callback, WorkItemPriority workItemPriority);
+
+        /// <summary>
+        /// Queue a work item
+        /// </summary>
+        /// <param name="callback">A callback to execute</param>
+        /// <param name="state">
+        /// The context object of the work item. Used for passing arguments to the work item. 
+        /// </param>
+        /// <returns>Returns a work item result</returns>
         IWorkItemResult QueueWorkItem(WorkItemCallback callback, object state);
+
+        /// <summary>
+        /// Queue a work item
+        /// </summary>
+        /// <param name="callback">A callback to execute</param>
+        /// <param name="state">
+        /// The context object of the work item. Used for passing arguments to the work item. 
+        /// </param>
+        /// <param name="workItemPriority">The work item priority</param>
+        /// <returns>Returns a work item result</returns>
         IWorkItemResult QueueWorkItem(WorkItemCallback callback, object state, WorkItemPriority workItemPriority);
+
+        /// <summary>
+        /// Queue a work item
+        /// </summary>
+        /// <param name="callback">A callback to execute</param>
+        /// <param name="state">
+        /// The context object of the work item. Used for passing arguments to the work item. 
+        /// </param>
+        /// <param name="postExecuteWorkItemCallback">
+        /// A delegate to call after the callback completion
+        /// </param>
+        /// <returns>Returns a work item result</returns>
         IWorkItemResult QueueWorkItem(WorkItemCallback callback, object state, PostExecuteWorkItemCallback postExecuteWorkItemCallback);
+
+        /// <summary>
+        /// Queue a work item
+        /// </summary>
+        /// <param name="callback">A callback to execute</param>
+        /// <param name="state">
+        /// The context object of the work item. Used for passing arguments to the work item. 
+        /// </param>
+        /// <param name="postExecuteWorkItemCallback">
+        /// A delegate to call after the callback completion
+        /// </param>
+        /// <param name="workItemPriority">The work item priority</param>
+        /// <returns>Returns a work item result</returns>
         IWorkItemResult QueueWorkItem(WorkItemCallback callback, object state, PostExecuteWorkItemCallback postExecuteWorkItemCallback, WorkItemPriority workItemPriority);
+
+        /// <summary>
+        /// Queue a work item
+        /// </summary>
+        /// <param name="callback">A callback to execute</param>
+        /// <param name="state">
+        /// The context object of the work item. Used for passing arguments to the work item. 
+        /// </param>
+        /// <param name="postExecuteWorkItemCallback">
+        /// A delegate to call after the callback completion
+        /// </param>
+        /// <param name="callToPostExecute">Indicates on which cases to call to the post execute callback</param>
+        /// <returns>Returns a work item result</returns>
         IWorkItemResult QueueWorkItem(WorkItemCallback callback, object state, PostExecuteWorkItemCallback postExecuteWorkItemCallback, CallToPostExecute callToPostExecute);
+
+        /// <summary>
+        /// Queue a work item
+        /// </summary>
+        /// <param name="callback">A callback to execute</param>
+        /// <param name="state">
+        /// The context object of the work item. Used for passing arguments to the work item. 
+        /// </param>
+        /// <param name="postExecuteWorkItemCallback">
+        /// A delegate to call after the callback completion
+        /// </param>
+        /// <param name="callToPostExecute">Indicates on which cases to call to the post execute callback</param>
+        /// <param name="workItemPriority">The work item priority</param>
+        /// <returns>Returns a work item result</returns>
         IWorkItemResult QueueWorkItem(WorkItemCallback callback, object state, PostExecuteWorkItemCallback postExecuteWorkItemCallback, CallToPostExecute callToPostExecute, WorkItemPriority workItemPriority);
 
+        /// <summary>
+        /// Queue a work item
+        /// </summary>
+        /// <param name="workItemInfo">Work item info</param>
+        /// <param name="callback">A callback to execute</param>
+        /// <returns>Returns a work item result</returns>
         IWorkItemResult QueueWorkItem(WorkItemInfo workItemInfo, WorkItemCallback callback);
-        IWorkItemResult QueueWorkItem(WorkItemInfo workItemInfo, WorkItemCallback callback, object state);
-
-        void WaitForIdle();
-        bool WaitForIdle(TimeSpan timeout);
-        bool WaitForIdle(int millisecondsTimeout);
 
-        int WaitingCallbacks { get; }
-        event WorkItemsGroupIdleHandler OnIdle;
-
-        void Cancel();
-        void Start();
-    }
+        /// <summary>
+        /// Queue a work item
+        /// </summary>
+        /// <param name="workItemInfo">Work item information</param>
+        /// <param name="callback">A callback to execute</param>
+        /// <param name="state">
+        /// The context object of the work item. Used for passing arguments to the work item. 
+        /// </param>
+        /// <returns>Returns a work item result</returns>
+        IWorkItemResult QueueWorkItem(WorkItemInfo workItemInfo, WorkItemCallback callback, object state);
 
-    #endregion
+        #endregion
 
-    #region CallToPostExecute enumerator
+        #region QueueWorkItem(Action<...>)
 
-    [Flags]
-    public enum CallToPostExecute
-    {
-        Never                    = 0x00,
-        WhenWorkItemCanceled     = 0x01,
-        WhenWorkItemNotCanceled  = 0x02,
-        Always                   = WhenWorkItemCanceled | WhenWorkItemNotCanceled,
-    }
+        /// <summary>
+        /// Queue a work item.
+        /// </summary>
+        /// <returns>Returns a IWorkItemResult object, but its GetResult() will always return null</returns>
+        IWorkItemResult QueueWorkItem(Action action);
 
-    #endregion
+        /// <summary>
+        /// Queue a work item.
+        /// </summary>
+        /// <returns>Returns a IWorkItemResult object, but its GetResult() will always return null</returns>
+        IWorkItemResult QueueWorkItem (Action action, WorkItemPriority priority);
 
-    #region IWorkItemResult interface
+        /// <summary>
+        /// Queue a work item.
+        /// </summary>
+        /// <returns>Returns a IWorkItemResult object, but its GetResult() will always return null</returns>
+        IWorkItemResult QueueWorkItem<T> (Action<T> action, T arg, WorkItemPriority priority);
 
-    /// <summary>
-    /// IWorkItemResult interface
-    /// </summary>
-    public interface IWorkItemResult
-    {
         /// <summary>
-        /// Get the result of the work item.
-        /// If the work item didn't run yet then the caller waits.
+        /// Queue a work item.
         /// </summary>
-        /// <returns>The result of the work item</returns>
-        object GetResult();
+        /// <returns>Returns a IWorkItemResult object, but its GetResult() will always return null</returns>
+        IWorkItemResult QueueWorkItem<T> (Action<T> action, T arg);
 
         /// <summary>
-        /// Get the result of the work item.
-        /// If the work item didn't run yet then the caller waits until timeout.
+        /// Queue a work item.
         /// </summary>
-        /// <returns>The result of the work item</returns>
-        /// On timeout throws WorkItemTimeoutException
-        object GetResult(
-            int millisecondsTimeout,
-            bool exitContext);
+        /// <returns>Returns a IWorkItemResult object, but its GetResult() will always return null</returns>
+        IWorkItemResult QueueWorkItem<T1, T2>(Action<T1, T2> action, T1 arg1, T2 arg2);
 
         /// <summary>
-        /// Get the result of the work item.
-        /// If the work item didn't run yet then the caller waits until timeout.
+        /// Queue a work item.
         /// </summary>
-        /// <returns>The result of the work item</returns>
-        /// On timeout throws WorkItemTimeoutException
-        object GetResult(            
-            TimeSpan timeout,
-            bool exitContext);
+        /// <returns>Returns a IWorkItemResult object, but its GetResult() will always return null</returns>
+        IWorkItemResult QueueWorkItem<T1, T2> (Action<T1, T2> action, T1 arg1, T2 arg2, WorkItemPriority priority);
 
-        void Abort();
+        /// <summary>
+        /// Queue a work item.
+        /// </summary>
+        /// <returns>Returns a IWorkItemResult object, but its GetResult() will always return null</returns>
+        IWorkItemResult QueueWorkItem<T1, T2, T3>(Action<T1, T2, T3> action, T1 arg1, T2 arg2, T3 arg3);
 
         /// <summary>
-        /// Get the result of the work item.
-        /// If the work item didn't run yet then the caller waits until timeout or until the cancelWaitHandle is signaled.
+        /// Queue a work item.
         /// </summary>
-        /// <param name="millisecondsTimeout">Timeout in milliseconds, or -1 for infinite</param>
-        /// <param name="exitContext">
-        /// true to exit the synchronization domain for the context before the wait (if in a synchronized context), and reacquire it; otherwise, false. 
-        /// </param>
-        /// <param name="cancelWaitHandle">A cancel wait handle to interrupt the blocking if needed</param>
-        /// <returns>The result of the work item</returns>
-        /// On timeout throws WorkItemTimeoutException
-        /// On cancel throws WorkItemCancelException
-        object GetResult(            
-            int millisecondsTimeout,
-            bool exitContext,
-            WaitHandle cancelWaitHandle);
+        /// <returns>Returns a IWorkItemResult object, but its GetResult() will always return null</returns>
+        IWorkItemResult QueueWorkItem<T1, T2, T3> (Action<T1, T2, T3> action, T1 arg1, T2 arg2, T3 arg3, WorkItemPriority priority);
 
         /// <summary>
-        /// Get the result of the work item.
-        /// If the work item didn't run yet then the caller waits until timeout or until the cancelWaitHandle is signaled.
+        /// Queue a work item.
         /// </summary>
-        /// <returns>The result of the work item</returns>
-        /// On timeout throws WorkItemTimeoutException
-        /// On cancel throws WorkItemCancelException
-        object GetResult(            
-            TimeSpan timeout,
-            bool exitContext,
-            WaitHandle cancelWaitHandle);
+        /// <returns>Returns a IWorkItemResult object, but its GetResult() will always return null</returns>
+        IWorkItemResult QueueWorkItem<T1, T2, T3, T4>(Action<T1, T2, T3, T4> action, T1 arg1, T2 arg2, T3 arg3, T4 arg4);
 
         /// <summary>
-        /// Get the result of the work item.
-        /// If the work item didn't run yet then the caller waits.
+        /// Queue a work item.
         /// </summary>
-        /// <param name="e">Filled with the exception if one was thrown</param>
-        /// <returns>The result of the work item</returns>
-        object GetResult(out Exception e);
+        /// <returns>Returns a IWorkItemResult object, but its GetResult() will always return null</returns>
+        IWorkItemResult QueueWorkItem<T1, T2, T3, T4> (Action<T1, T2, T3, T4> action, T1 arg1, T2 arg2, T3 arg3, T4 arg4, WorkItemPriority priority);
+
+        #endregion
+
+        #region QueueWorkItem(Func<...>)
 
         /// <summary>
-        /// Get the result of the work item.
-        /// If the work item didn't run yet then the caller waits until timeout.
+        /// Queue a work item.
         /// </summary>
-        /// <param name="e">Filled with the exception if one was thrown</param>
-        /// <returns>The result of the work item</returns>
-        /// On timeout throws WorkItemTimeoutException
-        object GetResult(
-            int millisecondsTimeout,
-            bool exitContext,
-            out Exception e);
+        /// <returns>Returns a IWorkItemResult&lt;TResult&gt; object. 
+        /// its GetResult() returns a TResult object</returns>
+        IWorkItemResult<TResult> QueueWorkItem<TResult>(Func<TResult> func);
 
         /// <summary>
-        /// Get the result of the work item.
-        /// If the work item didn't run yet then the caller waits until timeout.
+        /// Queue a work item.
         /// </summary>
-        /// <param name="e">Filled with the exception if one was thrown</param>
-        /// <returns>The result of the work item</returns>
-        /// On timeout throws WorkItemTimeoutException
-        object GetResult(            
-            TimeSpan timeout,
-            bool exitContext,
-            out Exception e);
+        /// <returns>Returns a IWorkItemResult&lt;TResult&gt; object. 
+        /// its GetResult() returns a TResult object</returns>
+        IWorkItemResult<TResult> QueueWorkItem<T, TResult>(Func<T, TResult> func, T arg);
 
         /// <summary>
-        /// Get the result of the work item.
-        /// If the work item didn't run yet then the caller waits until timeout or until the cancelWaitHandle is signaled.
+        /// Queue a work item.
         /// </summary>
-        /// <param name="millisecondsTimeout">Timeout in milliseconds, or -1 for infinite</param>
-        /// <param name="exitContext">
-        /// true to exit the synchronization domain for the context before the wait (if in a synchronized context), and reacquire it; otherwise, false. 
-        /// </param>
-        /// <param name="cancelWaitHandle">A cancel wait handle to interrupt the blocking if needed</param>
-        /// <param name="e">Filled with the exception if one was thrown</param>
-        /// <returns>The result of the work item</returns>
-        /// On timeout throws WorkItemTimeoutException
-        /// On cancel throws WorkItemCancelException
-        object GetResult(            
-            int millisecondsTimeout,
-            bool exitContext,
-            WaitHandle cancelWaitHandle,
-            out Exception e);
+        /// <returns>Returns a IWorkItemResult&lt;TResult&gt; object. 
+        /// its GetResult() returns a TResult object</returns>
+        IWorkItemResult<TResult> QueueWorkItem<T1, T2, TResult>(Func<T1, T2, TResult> func, T1 arg1, T2 arg2);
 
         /// <summary>
-        /// Get the result of the work item.
-        /// If the work item didn't run yet then the caller waits until timeout or until the cancelWaitHandle is signaled.
+        /// Queue a work item.
         /// </summary>
-        /// <returns>The result of the work item</returns>
-        /// <param name="e">Filled with the exception if one was thrown</param>
-        /// On timeout throws WorkItemTimeoutException
-        /// On cancel throws WorkItemCancelException
-        object GetResult(            
-            TimeSpan timeout,
-            bool exitContext,
-            WaitHandle cancelWaitHandle,
-            out Exception e);
+        /// <returns>Returns a IWorkItemResult&lt;TResult&gt; object. 
+        /// its GetResult() returns a TResult object</returns>
+        IWorkItemResult<TResult> QueueWorkItem<T1, T2, T3, TResult>(Func<T1, T2, T3, TResult> func, T1 arg1, T2 arg2, T3 arg3);
 
         /// <summary>
-        /// Gets an indication whether the asynchronous operation has completed.
+        /// Queue a work item.
         /// </summary>
-        bool IsCompleted { get; }
+        /// <returns>Returns a IWorkItemResult&lt;TResult&gt; object. 
+        /// its GetResult() returns a TResult object</returns>
+        IWorkItemResult<TResult> QueueWorkItem<T1, T2, T3, T4, TResult>(Func<T1, T2, T3, T4, TResult> func, T1 arg1, T2 arg2, T3 arg3, T4 arg4);
+
+        #endregion
+    }
+
+        #endregion
 
+        #region CallToPostExecute enumerator
+
+        [Flags]
+        public enum CallToPostExecute
+        {
         /// <summary>
-        /// Gets an indication whether the asynchronous operation has been canceled.
+        /// Never call to the PostExecute call back
         /// </summary>
-        bool IsCanceled { get; }
+                Never                    = 0x00,
 
         /// <summary>
-        /// Gets a user-defined object that qualifies or contains information about an asynchronous operation.
+        /// Call to the PostExecute only when the work item is cancelled
         /// </summary>
-        object State { get; }
+                WhenWorkItemCanceled     = 0x01,
 
         /// <summary>
-        /// Cancel the work item if it didn't start running yet.
+        /// Call to the PostExecute only when the work item is not cancelled
         /// </summary>
-        /// <returns>Returns true on success or false if the work item is in progress or already completed</returns>
-        bool Cancel();
+                WhenWorkItemNotCanceled  = 0x02,
 
         /// <summary>
-        /// Get the work item's priority
+        /// Always call to the PostExecute
         /// </summary>
-        WorkItemPriority WorkItemPriority { get; }
+                Always                   = WhenWorkItemCanceled | WhenWorkItemNotCanceled,
+        }
+
+        #endregion
 
+        #region IWorkItemResult interface
+
+    /// <summary>
+    /// The common interface of IWorkItemResult and IWorkItemResult&lt;T&gt;
+    /// </summary>
+    public interface IWaitableResult
+    {
         /// <summary>
-        /// Return the result, same as GetResult()
+        /// This method intent is for internal use.
         /// </summary>
-        object Result { get; }
+        /// <returns></returns>
+        IWorkItemResult GetWorkItemResult();
 
         /// <summary>
-        /// Returns the exception if occured otherwise returns null.
+        /// This method intent is for internal use.
         /// </summary>
-        object Exception { get; }
+        /// <returns></returns>
+        IWorkItemResult<TResult> GetWorkItemResultT<TResult>();
     }
 
+    /// <summary>
+    /// IWorkItemResult interface.
+    /// Created when a WorkItemCallback work item is queued.
+    /// </summary>
+    public interface IWorkItemResult : IWorkItemResult<object>
+    {
+    }
+
+        /// <summary>
+    /// IWorkItemResult&lt;TResult&gt; interface.
+    /// Created when a Func&lt;TResult&gt; work item is queued.
+        /// </summary>
+    public interface IWorkItemResult<TResult> : IWaitableResult
+        {
+                /// <summary>
+                /// Get the result of the work item.
+                /// If the work item didn't run yet then the caller waits.
+                /// </summary>
+                /// <returns>The result of the work item</returns>
+        TResult GetResult();
+
+                /// <summary>
+                /// Get the result of the work item.
+                /// If the work item didn't run yet then the caller waits until timeout.
+                /// </summary>
+                /// <returns>The result of the work item</returns>
+                /// On timeout throws WorkItemTimeoutException
+        TResult GetResult(
+                        int millisecondsTimeout,
+                        bool exitContext);
+
+                /// <summary>
+                /// Get the result of the work item.
+                /// If the work item didn't run yet then the caller waits until timeout.
+                /// </summary>
+                /// <returns>The result of the work item</returns>
+                /// On timeout throws WorkItemTimeoutException
+        TResult GetResult(                      
+                        TimeSpan timeout,
+                        bool exitContext);
+
+                /// <summary>
+                /// Get the result of the work item.
+                /// If the work item didn't run yet then the caller waits until timeout or until the cancelWaitHandle is signaled.
+                /// </summary>
+                /// <param name="millisecondsTimeout">Timeout in milliseconds, or -1 for infinite</param>
+                /// <param name="exitContext">
+                /// true to exit the synchronization domain for the context before the wait (if in a synchronized context), and reacquire it; otherwise, false. 
+                /// </param>
+                /// <param name="cancelWaitHandle">A cancel wait handle to interrupt the blocking if needed</param>
+                /// <returns>The result of the work item</returns>
+                /// On timeout throws WorkItemTimeoutException
+                /// On cancel throws WorkItemCancelException
+        TResult GetResult(                      
+                        int millisecondsTimeout,
+                        bool exitContext,
+                        WaitHandle cancelWaitHandle);
+
+                /// <summary>
+                /// Get the result of the work item.
+                /// If the work item didn't run yet then the caller waits until timeout or until the cancelWaitHandle is signaled.
+                /// </summary>
+                /// <returns>The result of the work item</returns>
+                /// On timeout throws WorkItemTimeoutException
+                /// On cancel throws WorkItemCancelException
+        TResult GetResult(                      
+                        TimeSpan timeout,
+                        bool exitContext,
+                        WaitHandle cancelWaitHandle);
+
+                /// <summary>
+                /// Get the result of the work item.
+                /// If the work item didn't run yet then the caller waits.
+                /// </summary>
+                /// <param name="e">Filled with the exception if one was thrown</param>
+                /// <returns>The result of the work item</returns>
+        TResult GetResult(out Exception e);
+
+                /// <summary>
+                /// Get the result of the work item.
+                /// If the work item didn't run yet then the caller waits until timeout.
+                /// </summary>
+                /// <param name="millisecondsTimeout"></param>
+                /// <param name="exitContext"></param>
+                /// <param name="e">Filled with the exception if one was thrown</param>
+                /// <returns>The result of the work item</returns>
+                /// On timeout throws WorkItemTimeoutException
+        TResult GetResult(
+                        int millisecondsTimeout,
+                        bool exitContext,
+                        out Exception e);
+
+                /// <summary>
+                /// Get the result of the work item.
+                /// If the work item didn't run yet then the caller waits until timeout.
+                /// </summary>
+                /// <param name="exitContext"></param>
+                /// <param name="e">Filled with the exception if one was thrown</param>
+                /// <param name="timeout"></param>
+                /// <returns>The result of the work item</returns>
+                /// On timeout throws WorkItemTimeoutException
+        TResult GetResult(                      
+                        TimeSpan timeout,
+                        bool exitContext,
+                        out Exception e);
+
+                /// <summary>
+                /// Get the result of the work item.
+                /// If the work item didn't run yet then the caller waits until timeout or until the cancelWaitHandle is signaled.
+                /// </summary>
+                /// <param name="millisecondsTimeout">Timeout in milliseconds, or -1 for infinite</param>
+                /// <param name="exitContext">
+                /// true to exit the synchronization domain for the context before the wait (if in a synchronized context), and reacquire it; otherwise, false. 
+                /// </param>
+                /// <param name="cancelWaitHandle">A cancel wait handle to interrupt the blocking if needed</param>
+                /// <param name="e">Filled with the exception if one was thrown</param>
+                /// <returns>The result of the work item</returns>
+                /// On timeout throws WorkItemTimeoutException
+                /// On cancel throws WorkItemCancelException
+        TResult GetResult(                      
+                        int millisecondsTimeout,
+                        bool exitContext,
+                        WaitHandle cancelWaitHandle,
+                        out Exception e);
+
+                /// <summary>
+                /// Get the result of the work item.
+                /// If the work item didn't run yet then the caller waits until timeout or until the cancelWaitHandle is signaled.
+                /// </summary>
+                /// <returns>The result of the work item</returns>
+                /// <param name="cancelWaitHandle"></param>
+                /// <param name="e">Filled with the exception if one was thrown</param>
+                /// <param name="timeout"></param>
+                /// <param name="exitContext"></param>
+                /// On timeout throws WorkItemTimeoutException
+                /// On cancel throws WorkItemCancelException
+        TResult GetResult(                      
+                        TimeSpan timeout,
+                        bool exitContext,
+                        WaitHandle cancelWaitHandle,
+                        out Exception e);
+
+                /// <summary>
+                /// Gets an indication whether the asynchronous operation has completed.
+                /// </summary>
+                bool IsCompleted { get; }
+
+                /// <summary>
+                /// Gets an indication whether the asynchronous operation has been canceled.
+                /// </summary>
+                bool IsCanceled { get; }
+
+                /// <summary>
+                /// Gets the user-defined object that contains context data 
+        /// for the work item method.
+                /// </summary>
+                object State { get; }
+
+                /// <summary>
+        /// Same as Cancel(false).
+                /// </summary>
+        bool Cancel();
+
+        /// <summary>
+        /// Cancel the work item execution.
+        /// If the work item is in the queue then it won't execute
+        /// If the work item is completed, it will remain completed
+        /// If the work item is in progress then the user can check the SmartThreadPool.IsWorkItemCanceled
+        ///   property to check if the work item has been cancelled. If the abortExecution is set to true then
+        ///   the Smart Thread Pool will send an AbortException to the running thread to stop the execution 
+        ///   of the work item. When an in progress work item is canceled its GetResult will throw WorkItemCancelException.
+        /// If the work item is already cancelled it will remain cancelled
+        /// </summary>
+        /// <param name="abortExecution">When true send an AbortException to the executing thread.</param>
+        /// <returns>Returns true if the work item was not completed, otherwise false.</returns>
+        bool Cancel(bool abortExecution);
+
+                /// <summary>
+                /// Get the work item's priority
+                /// </summary>
+                WorkItemPriority WorkItemPriority { get; }
+
+                /// <summary>
+                /// Return the result, same as GetResult()
+                /// </summary>
+        TResult Result { get; }
+
+                /// <summary>
+                /// Returns the exception if occured otherwise returns null.
+                /// </summary>
+                object Exception { get; }
+        }
+
+        #endregion
+
+    #region .NET 3.5
+
+    // All these delegate are built-in .NET 3.5
+    // Comment/Remove them when compiling to .NET 3.5 to avoid ambiguity.
+
+    public delegate void Action();
+    public delegate void Action<T1, T2>(T1 arg1, T2 arg2);
+    public delegate void Action<T1, T2, T3>(T1 arg1, T2 arg2, T3 arg3);
+    public delegate void Action<T1, T2, T3, T4>(T1 arg1, T2 arg2, T3 arg3, T4 arg4);
+
+    public delegate TResult Func<TResult>();
+    public delegate TResult Func<T, TResult>(T arg1);
+    public delegate TResult Func<T1, T2, TResult>(T1 arg1, T2 arg2);
+    public delegate TResult Func<T1, T2, T3, TResult>(T1 arg1, T2 arg2, T3 arg3);
+    public delegate TResult Func<T1, T2, T3, T4, TResult>(T1 arg1, T2 arg2, T3 arg3, T4 arg4);
+
     #endregion
 }
diff --git a/ThirdParty/SmartThreadPool/InternalInterfaces.cs b/ThirdParty/SmartThreadPool/InternalInterfaces.cs
new file mode 100644
index 0000000..0072e10
--- /dev/null
+++ b/ThirdParty/SmartThreadPool/InternalInterfaces.cs
@@ -0,0 +1,27 @@
+
+namespace Amib.Threading.Internal
+{
+    /// <summary>
+    /// An internal delegate to call when the WorkItem starts or completes
+    /// </summary>
+    internal delegate void WorkItemStateCallback(WorkItem workItem);
+
+    internal interface IInternalWorkItemResult
+    {
+        event WorkItemStateCallback OnWorkItemStarted;
+        event WorkItemStateCallback OnWorkItemCompleted;
+    }
+
+    internal interface IInternalWaitableResult
+    {
+        /// <summary>
+        /// This method is intent for internal use.
+        /// </summary>   
+        IWorkItemResult GetWorkItemResult();
+    }
+
+    public interface IHasWorkItemPriority
+    {
+        WorkItemPriority WorkItemPriority { get; }
+    }
+}
diff --git a/ThirdParty/SmartThreadPool/PriorityQueue.cs b/ThirdParty/SmartThreadPool/PriorityQueue.cs
index 63d5e84..409c879 100644
--- a/ThirdParty/SmartThreadPool/PriorityQueue.cs
+++ b/ThirdParty/SmartThreadPool/PriorityQueue.cs
@@ -1,240 +1,239 @@
-// Ami Bar
-// amibar@gmail.com
-
 using System;
 using System.Collections;
+using System.Collections.Generic;
 using System.Diagnostics;
 
 namespace Amib.Threading.Internal
 {
-    #region PriorityQueue class
-
-    /// <summary>
-    /// PriorityQueue class
-    /// This class is not thread safe because we use external lock
-    /// </summary>
-    public sealed class PriorityQueue : IEnumerable
-    {
-        #region Private members
-
-        /// <summary>
-        /// The number of queues, there is one for each type of priority
-        /// </summary>
-        private const int _queuesCount = WorkItemPriority.Highest-WorkItemPriority.Lowest+1;
-
-        /// <summary>
-        /// Work items queues. There is one for each type of priority
-        /// </summary>
-        private Queue [] _queues = new Queue[_queuesCount];
-
-        /// <summary>
-        /// The total number of work items within the queues 
-        /// </summary>
-        private int _workItemsCount = 0;
-
-        /// <summary>
-        /// Use with IEnumerable interface
-        /// </summary>
-        private int _version = 0;
-
-        #endregion
-
-        #region Contructor
-
-        public PriorityQueue()
-        {
-            for(int i = 0; i < _queues.Length; ++i)
-            {
-                _queues[i] = new Queue();
-            }
-        }
-
-        #endregion
-
-        #region Methods
-
-        /// <summary>
-        /// Enqueue a work item.
-        /// </summary>
-        /// <param name="workItem">A work item</param>
-        public void Enqueue(IHasWorkItemPriority workItem)
-        {
-            Debug.Assert(null != workItem);
-
-            int queueIndex = _queuesCount-(int)workItem.WorkItemPriority-1;
-            Debug.Assert(queueIndex >= 0);
-            Debug.Assert(queueIndex < _queuesCount);
-
-            _queues[queueIndex].Enqueue(workItem);
-            ++_workItemsCount;
-            ++_version;
-        }
-
-        /// <summary>
-        /// Dequeque a work item.
-        /// </summary>
-        /// <returns>Returns the next work item</returns>
-        public IHasWorkItemPriority Dequeue()
-        {
-            IHasWorkItemPriority workItem = null;
-
-            if(_workItemsCount > 0)
-            {
-                int queueIndex = GetNextNonEmptyQueue(-1);
-                Debug.Assert(queueIndex >= 0);
-                workItem = _queues[queueIndex].Dequeue() as IHasWorkItemPriority;
-                Debug.Assert(null != workItem);
-                --_workItemsCount;
-                ++_version;
-            }
-
-            return workItem;
-        }
-
-        /// <summary>
-        /// Find the next non empty queue starting at queue queueIndex+1
-        /// </summary>
-        /// <param name="queueIndex">The index-1 to start from</param>
-        /// <returns>
-        /// The index of the next non empty queue or -1 if all the queues are empty
-        /// </returns>
-        private int GetNextNonEmptyQueue(int queueIndex)
-        {
-            for(int i = queueIndex+1; i < _queuesCount; ++i)
-            {
-                if(_queues[i].Count > 0)
-                {
-                    return i;
-                }
-            }
-            return -1;
-        }
-
-        /// <summary>
-        /// The number of work items 
-        /// </summary>
-        public int Count
-        {
-            get
-            {
-                return _workItemsCount;
-            }
-        }
-
-        /// <summary>
-        /// Clear all the work items 
-        /// </summary>
-        public void Clear()
-        {
-            if (_workItemsCount > 0)
-            {
-                foreach(Queue queue in _queues)
-                {
-                    queue.Clear();
-                }
-                _workItemsCount = 0;
-                ++_version;
-            }
-        }
-
-        #endregion
-
-        #region IEnumerable Members
-
-        /// <summary>
-        /// Returns an enumerator to iterate over the work items
-        /// </summary>
-        /// <returns>Returns an enumerator</returns>
-        public IEnumerator GetEnumerator()
-        {
-            return new PriorityQueueEnumerator(this);
-        }
-
-        #endregion
-
-        #region PriorityQueueEnumerator
-
-        /// <summary>
-        /// The class the implements the enumerator
-        /// </summary>
-        private class PriorityQueueEnumerator : IEnumerator
-        {
-            private PriorityQueue _priorityQueue;
-            private int _version;
-            private int _queueIndex;
-            private IEnumerator _enumerator;
-
-            public PriorityQueueEnumerator(PriorityQueue priorityQueue)
-            {
-                _priorityQueue = priorityQueue;
-                _version = _priorityQueue._version;
-                _queueIndex = _priorityQueue.GetNextNonEmptyQueue(-1);
-                if (_queueIndex >= 0)
-                {
-                    _enumerator = _priorityQueue._queues[_queueIndex].GetEnumerator();
-                }
-                else
-                {
-                    _enumerator = null;
-                }
-            }
-
-            #region IEnumerator Members
-
-            public void Reset()
-            {
-                _version = _priorityQueue._version;
-                _queueIndex = _priorityQueue.GetNextNonEmptyQueue(-1);
-                if (_queueIndex >= 0)
-                {
-                    _enumerator = _priorityQueue._queues[_queueIndex].GetEnumerator();
-                }
-                else
-                {
-                    _enumerator = null;
-                }
-            }
-
-            public object Current
-            {
-                get
-                {
-                    Debug.Assert(null != _enumerator);
-                    return _enumerator.Current;
-                }
-            }
-
-            public bool MoveNext()
-            {
-                if (null == _enumerator)
-                {
-                    return false;
-                }
-
-                if(_version != _priorityQueue._version)
-                {
-                    throw new InvalidOperationException("The collection has been modified");
-
-                }
-                if (!_enumerator.MoveNext())
-                {
-                    _queueIndex = _priorityQueue.GetNextNonEmptyQueue(_queueIndex);
-                    if(-1 == _queueIndex)
-                    {
-                        return false;
-                    }
-                    _enumerator = _priorityQueue._queues[_queueIndex].GetEnumerator();
-                    _enumerator.MoveNext();
-                    return true;
-                }
-                return true;
-            }
-
-            #endregion
-        }
-
-        #endregion
-    }
-
-    #endregion
+        #region PriorityQueue class
+
+        /// <summary>
+        /// PriorityQueue class
+        /// This class is not thread safe because we use external lock
+        /// </summary>
+        public sealed class PriorityQueue : IEnumerable
+        {
+                #region Private members
+
+                /// <summary>
+                /// The number of queues, there is one for each type of priority
+                /// </summary>
+                private const int _queuesCount = WorkItemPriority.Highest-WorkItemPriority.Lowest+1;
+
+                /// <summary>
+                /// Work items queues. There is one for each type of priority
+                /// </summary>
+        private readonly LinkedList<IHasWorkItemPriority>[] _queues = new LinkedList<IHasWorkItemPriority>[_queuesCount];
+
+                /// <summary>
+                /// The total number of work items within the queues 
+                /// </summary>
+                private int _workItemsCount;
+
+                /// <summary>
+                /// Use with IEnumerable interface
+                /// </summary>
+                private int _version;
+
+                #endregion
+
+                #region Contructor
+
+                public PriorityQueue()
+                {
+                        for(int i = 0; i < _queues.Length; ++i)
+                        {
+                _queues[i] = new LinkedList<IHasWorkItemPriority>();
+                        }
+                }
+
+                #endregion
+
+                #region Methods
+
+                /// <summary>
+                /// Enqueue a work item.
+                /// </summary>
+                /// <param name="workItem">A work item</param>
+                public void Enqueue(IHasWorkItemPriority workItem)
+                {
+                        Debug.Assert(null != workItem);
+
+                        int queueIndex = _queuesCount-(int)workItem.WorkItemPriority-1;
+                        Debug.Assert(queueIndex >= 0);
+                        Debug.Assert(queueIndex < _queuesCount);
+
+                        _queues[queueIndex].AddLast(workItem);
+                        ++_workItemsCount;
+                        ++_version;
+                }
+
+                /// <summary>
+                /// Dequeque a work item.
+                /// </summary>
+                /// <returns>Returns the next work item</returns>
+                public IHasWorkItemPriority Dequeue()
+                {
+                        IHasWorkItemPriority workItem = null;
+
+                        if(_workItemsCount > 0)
+                        {
+                                int queueIndex = GetNextNonEmptyQueue(-1);
+                                Debug.Assert(queueIndex >= 0);
+                workItem = _queues[queueIndex].First.Value;
+                                _queues[queueIndex].RemoveFirst();
+                                Debug.Assert(null != workItem);
+                                --_workItemsCount;
+                                ++_version;
+                        }
+
+                        return workItem;
+                }
+
+                /// <summary>
+                /// Find the next non empty queue starting at queue queueIndex+1
+                /// </summary>
+                /// <param name="queueIndex">The index-1 to start from</param>
+                /// <returns>
+                /// The index of the next non empty queue or -1 if all the queues are empty
+                /// </returns>
+                private int GetNextNonEmptyQueue(int queueIndex)
+                {
+                        for(int i = queueIndex+1; i < _queuesCount; ++i)
+                        {
+                                if(_queues[i].Count > 0)
+                                {
+                                        return i;
+                                }
+                        }
+                        return -1;
+                }
+
+                /// <summary>
+                /// The number of work items 
+                /// </summary>
+                public int Count
+                {
+                        get
+                        {
+                                return _workItemsCount;
+                        }
+                }
+
+                /// <summary>
+                /// Clear all the work items 
+                /// </summary>
+                public void Clear()
+                {
+                        if (_workItemsCount > 0)
+                        {
+                                foreach(LinkedList<IHasWorkItemPriority> queue in _queues)
+                                {
+                                        queue.Clear();
+                                }
+                                _workItemsCount = 0;
+                                ++_version;
+                        }
+                }
+
+                #endregion
+
+                #region IEnumerable Members
+
+                /// <summary>
+                /// Returns an enumerator to iterate over the work items
+                /// </summary>
+                /// <returns>Returns an enumerator</returns>
+                public IEnumerator GetEnumerator()
+                {
+                        return new PriorityQueueEnumerator(this);
+                }
+
+                #endregion
+
+                #region PriorityQueueEnumerator
+
+                /// <summary>
+                /// The class the implements the enumerator
+                /// </summary>
+                private class PriorityQueueEnumerator : IEnumerator
+                {
+                        private readonly PriorityQueue _priorityQueue;
+                        private int _version;
+                        private int _queueIndex;
+                        private IEnumerator _enumerator;
+
+                        public PriorityQueueEnumerator(PriorityQueue priorityQueue)
+                        {
+                                _priorityQueue = priorityQueue;
+                                _version = _priorityQueue._version;
+                                _queueIndex = _priorityQueue.GetNextNonEmptyQueue(-1);
+                                if (_queueIndex >= 0)
+                                {
+                                        _enumerator = _priorityQueue._queues[_queueIndex].GetEnumerator();
+                                }
+                                else
+                                {
+                                        _enumerator = null;
+                                }
+                        }
+
+                        #region IEnumerator Members
+
+                        public void Reset()
+                        {
+                                _version = _priorityQueue._version;
+                                _queueIndex = _priorityQueue.GetNextNonEmptyQueue(-1);
+                                if (_queueIndex >= 0)
+                                {
+                                        _enumerator = _priorityQueue._queues[_queueIndex].GetEnumerator();
+                                }
+                                else
+                                {
+                                        _enumerator = null;
+                                }
+                        }
+
+                        public object Current
+                        {
+                                get
+                                {
+                                        Debug.Assert(null != _enumerator);
+                                        return _enumerator.Current;
+                                }
+                        }
+
+                        public bool MoveNext()
+                        {
+                                if (null == _enumerator)
+                                {
+                                        return false;
+                                }
+
+                                if(_version != _priorityQueue._version)
+                                {
+                                        throw new InvalidOperationException("The collection has been modified");
+
+                                }
+                                if (!_enumerator.MoveNext())
+                                {
+                                        _queueIndex = _priorityQueue.GetNextNonEmptyQueue(_queueIndex);
+                                        if(-1 == _queueIndex)
+                                        {
+                                                return false;
+                                        }
+                                        _enumerator = _priorityQueue._queues[_queueIndex].GetEnumerator();
+                                        _enumerator.MoveNext();
+                                        return true;
+                                }
+                                return true;
+                        }
+
+                        #endregion
+                }
+
+                #endregion
+        }
+
+        #endregion
 }
diff --git a/ThirdParty/SmartThreadPool/Properties/AssemblyInfo.cs b/ThirdParty/SmartThreadPool/Properties/AssemblyInfo.cs
new file mode 100644
index 0000000..4728c1f
--- /dev/null
+++ b/ThirdParty/SmartThreadPool/Properties/AssemblyInfo.cs
@@ -0,0 +1,23 @@
+using System.Reflection;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+
+[assembly: AssemblyTitle("Amib.Threading")]
+[assembly: AssemblyDescription("Smart Thread Pool")]
+[assembly: AssemblyConfiguration("")]
+[assembly: AssemblyCompany("")]
+[assembly: AssemblyProduct("Amib.Threading")]
+[assembly: AssemblyCopyright("")]
+[assembly: AssemblyTrademark("")]
+[assembly: AssemblyCulture("")]
+[assembly: ComVisible(false)]
+[assembly: Guid("c764a3de-c4f8-434d-85b5-a09830d1e44f")]
+[assembly: AssemblyVersion("2.2.3.0")]
+
+#if (_PUBLISH)
+[assembly: InternalsVisibleTo("STPTests,PublicKey=00240000048000009400000006020000002400005253413100040000010001004fe3d39add741ba7c8d52cd1eb0d94c7d79060ad956cbaff0e51c1dce94db10356b261778bc1ac3114b3218434da6fcd8416dd5507653809598f7d2afc422099ce4f6b7b0477f18e6c57c727ef2a7ab6ee56e6b4589fe44cb0e25f2875a3c65ab0383ee33c4dd93023f7ce1218bebc8b7a9a1dac878938f5c4f45ea74b6bd8ad")]
+#else
+[assembly: InternalsVisibleTo("STPTests")]
+#endif
+
+
diff --git a/ThirdParty/SmartThreadPool/SLExt.cs b/ThirdParty/SmartThreadPool/SLExt.cs
new file mode 100644
index 0000000..23a60bc
--- /dev/null
+++ b/ThirdParty/SmartThreadPool/SLExt.cs
@@ -0,0 +1,16 @@
+#if _SILVERLIGHT
+
+using System.Threading;
+
+namespace Amib.Threading
+{
+    public enum ThreadPriority
+    {
+        Lowest,
+        BelowNormal,
+        Normal,
+        AboveNormal,
+        Highest,
+    }
+}
+#endif
diff --git a/ThirdParty/SmartThreadPool/STPEventWaitHandle.cs b/ThirdParty/SmartThreadPool/STPEventWaitHandle.cs
new file mode 100644
index 0000000..9b17f69
--- /dev/null
+++ b/ThirdParty/SmartThreadPool/STPEventWaitHandle.cs
@@ -0,0 +1,62 @@
+#if !(_WINDOWS_CE)
+
+using System;
+using System.Threading;
+
+namespace Amib.Threading.Internal
+{
+#if _WINDOWS ||  WINDOWS_PHONE
+    internal static class STPEventWaitHandle
+    {
+        public const int WaitTimeout = Timeout.Infinite;
+
+        internal static bool WaitAll(WaitHandle[] waitHandles, int millisecondsTimeout, bool exitContext)
+        {
+            return WaitHandle.WaitAll(waitHandles, millisecondsTimeout);
+        }
+
+        internal static int WaitAny(WaitHandle[] waitHandles)
+        {
+            return WaitHandle.WaitAny(waitHandles);
+        }
+
+        internal static int WaitAny(WaitHandle[] waitHandles, int millisecondsTimeout, bool exitContext)
+        {
+            return WaitHandle.WaitAny(waitHandles, millisecondsTimeout);
+        }
+
+        internal static bool WaitOne(WaitHandle waitHandle, int millisecondsTimeout, bool exitContext)
+        {
+            return waitHandle.WaitOne(millisecondsTimeout);
+        }
+    }
+#else
+    internal static class STPEventWaitHandle
+    {
+        public const int WaitTimeout = Timeout.Infinite;
+
+        internal static bool WaitAll(WaitHandle[] waitHandles, int millisecondsTimeout, bool exitContext)
+        {
+            return WaitHandle.WaitAll(waitHandles, millisecondsTimeout, exitContext);
+        }
+
+        internal static int WaitAny(WaitHandle[] waitHandles)
+        {
+            return WaitHandle.WaitAny(waitHandles);
+        }
+
+        internal static int WaitAny(WaitHandle[] waitHandles, int millisecondsTimeout, bool exitContext)
+        {
+            return WaitHandle.WaitAny(waitHandles, millisecondsTimeout, exitContext);
+        }
+
+        internal static bool WaitOne(WaitHandle waitHandle, int millisecondsTimeout, bool exitContext)
+        {
+            return waitHandle.WaitOne(millisecondsTimeout, exitContext);
+        }
+    }
+#endif
+
+}
+
+#endif
\ No newline at end of file
diff --git a/ThirdParty/SmartThreadPool/STPPerformanceCounter.cs b/ThirdParty/SmartThreadPool/STPPerformanceCounter.cs
index 077cf17..0663d1d 100644
--- a/ThirdParty/SmartThreadPool/STPPerformanceCounter.cs
+++ b/ThirdParty/SmartThreadPool/STPPerformanceCounter.cs
@@ -1,354 +1,448 @@
 using System;
 using System.Diagnostics;
+using System.Threading;
+
+namespace Amib.Threading
+{
+    public interface ISTPPerformanceCountersReader
+    {
+        long InUseThreads { get; }
+        long ActiveThreads { get; }
+        long WorkItemsQueued { get; }
+        long WorkItemsProcessed { get; }
+    }
+}
 
 namespace Amib.Threading.Internal
 {
-    internal enum STPPerformanceCounterType
+    internal interface ISTPInstancePerformanceCounters : IDisposable
     {
-        // Fields
-        ActiveThreads                = 0,
-        InUseThreads                = 1,
-        OverheadThreads                = 2,
-        OverheadThreadsPercent        = 3,
-        OverheadThreadsPercentBase    = 4,
+        void Close();
+        void SampleThreads(long activeThreads, long inUseThreads);
+        void SampleWorkItems(long workItemsQueued, long workItemsProcessed);
+        void SampleWorkItemsWaitTime(TimeSpan workItemWaitTime);
+        void SampleWorkItemsProcessTime(TimeSpan workItemProcessTime);
+    }
+#if !(_WINDOWS_CE) && !(_SILVERLIGHT) && !(WINDOWS_PHONE)
 
-        WorkItems                    = 5,
-        WorkItemsInQueue            = 6,
-        WorkItemsProcessed            = 7,
+    internal enum STPPerformanceCounterType
+        {
+                // Fields
+                ActiveThreads                           = 0,
+                InUseThreads                            = 1,
+                OverheadThreads                         = 2,
+                OverheadThreadsPercent          = 3,
+                OverheadThreadsPercentBase      = 4,
 
-        WorkItemsQueuedPerSecond    = 8,
-        WorkItemsProcessedPerSecond    = 9,
+                WorkItems                                       = 5,
+                WorkItemsInQueue                        = 6,
+                WorkItemsProcessed                      = 7,
 
-        AvgWorkItemWaitTime            = 10,
-        AvgWorkItemWaitTimeBase        = 11,
+                WorkItemsQueuedPerSecond        = 8,
+                WorkItemsProcessedPerSecond     = 9,
 
-        AvgWorkItemProcessTime        = 12,
-        AvgWorkItemProcessTimeBase    = 13,
+                AvgWorkItemWaitTime                     = 10,
+                AvgWorkItemWaitTimeBase         = 11,
 
-        WorkItemsGroups                = 14,
+                AvgWorkItemProcessTime          = 12,
+                AvgWorkItemProcessTimeBase      = 13,
 
-        LastCounter                    = 14,
-    }
- 
+                WorkItemsGroups                         = 14,
 
-    /// <summary>
-    /// Summary description for STPPerformanceCounter.
-    /// </summary>
-    internal class STPPerformanceCounter
-    {
-        // Fields
-        private PerformanceCounterType _pcType;
-        protected string _counterHelp;
-        protected string _counterName;
-
-        // Methods
-        public STPPerformanceCounter(
-            string counterName, 
-            string counterHelp, 
-            PerformanceCounterType pcType)
-        {
-            this._counterName = counterName;
-            this._counterHelp = counterHelp;
-            this._pcType = pcType;
-        }
-
-        public void AddCounterToCollection(CounterCreationDataCollection counterData)
-        {
-            CounterCreationData counterCreationData = new CounterCreationData(
-                _counterName, 
-                _counterHelp, 
-                _pcType);
+                LastCounter                                     = 14,
+        }
+ 
 
-            counterData.Add(counterCreationData);
-        }
+        /// <summary>
+        /// Summary description for STPPerformanceCounter.
+        /// </summary>
+        internal class STPPerformanceCounter
+        {
+                // Fields
+                private readonly PerformanceCounterType _pcType;
+                protected string _counterHelp;
+                protected string _counterName;
+
+                // Methods
+                public STPPerformanceCounter(
+                        string counterName, 
+                        string counterHelp, 
+                        PerformanceCounterType pcType)
+                {
+                        _counterName = counterName;
+                        _counterHelp = counterHelp;
+                        _pcType = pcType;
+                }
+
+                public void AddCounterToCollection(CounterCreationDataCollection counterData)
+                {
+                        CounterCreationData counterCreationData = new CounterCreationData(
+                                _counterName, 
+                                _counterHelp, 
+                                _pcType);
+
+                        counterData.Add(counterCreationData);
+                }
+ 
+                // Properties
+                public string Name
+                {
+                        get
+                        {
+                                return _counterName;
+                        }
+                }
+        }
+
+        internal class STPPerformanceCounters
+        {
+                // Fields
+                internal STPPerformanceCounter[] _stpPerformanceCounters;
+                private static readonly STPPerformanceCounters _instance;
+                internal const string _stpCategoryHelp = "SmartThreadPool performance counters";
+                internal const string _stpCategoryName = "SmartThreadPool";
+
+                // Methods
+                static STPPerformanceCounters()
+                {
+                        _instance = new STPPerformanceCounters();
+                }
+ 
+                private STPPerformanceCounters()
+                {
+                        STPPerformanceCounter[] stpPerformanceCounters = new STPPerformanceCounter[] 
+                                { 
+                                        new STPPerformanceCounter("Active threads", "The current number of available in the thread pool.", PerformanceCounterType.NumberOfItems32), 
+                                        new STPPerformanceCounter("In use threads", "The current number of threads that execute a work item.", PerformanceCounterType.NumberOfItems32), 
+                                        new STPPerformanceCounter("Overhead threads", "The current number of threads that are active, but are not in use.", PerformanceCounterType.NumberOfItems32), 
+                                        new STPPerformanceCounter("% overhead threads", "The current number of threads that are active, but are not in use in percents.", PerformanceCounterType.RawFraction), 
+                                        new STPPerformanceCounter("% overhead threads base", "The current number of threads that are active, but are not in use in percents.", PerformanceCounterType.RawBase), 
+
+                                        new STPPerformanceCounter("Work Items", "The number of work items in the Smart Thread Pool. Both queued and processed.", PerformanceCounterType.NumberOfItems32), 
+                                        new STPPerformanceCounter("Work Items in queue", "The current number of work items in the queue", PerformanceCounterType.NumberOfItems32), 
+                                        new STPPerformanceCounter("Work Items processed", "The number of work items already processed", PerformanceCounterType.NumberOfItems32), 
+
+                                        new STPPerformanceCounter("Work Items queued/sec", "The number of work items queued per second", PerformanceCounterType.RateOfCountsPerSecond32), 
+                                        new STPPerformanceCounter("Work Items processed/sec", "The number of work items processed per second", PerformanceCounterType.RateOfCountsPerSecond32), 
+
+                                        new STPPerformanceCounter("Avg. Work Item wait time/sec", "The average time a work item supends in the queue waiting for its turn to execute.", PerformanceCounterType.AverageCount64), 
+                                        new STPPerformanceCounter("Avg. Work Item wait time base", "The average time a work item supends in the queue waiting for its turn to execute.", PerformanceCounterType.AverageBase), 
+
+                                        new STPPerformanceCounter("Avg. Work Item process time/sec", "The average time it takes to process a work item.", PerformanceCounterType.AverageCount64), 
+                                        new STPPerformanceCounter("Avg. Work Item process time base", "The average time it takes to process a work item.", PerformanceCounterType.AverageBase), 
+
+                                        new STPPerformanceCounter("Work Items Groups", "The current number of work item groups associated with the Smart Thread Pool.", PerformanceCounterType.NumberOfItems32), 
+                                };
+
+                        _stpPerformanceCounters = stpPerformanceCounters;
+                        SetupCategory();
+                }
+ 
+                private void SetupCategory()
+                {
+                        if (!PerformanceCounterCategory.Exists(_stpCategoryName))
+                        {
+                                CounterCreationDataCollection counters = new CounterCreationDataCollection();
+
+                                for (int i = 0; i < _stpPerformanceCounters.Length; i++)
+                                {
+                                        _stpPerformanceCounters[i].AddCounterToCollection(counters);
+                                }
+
+                                PerformanceCounterCategory.Create(
+                                        _stpCategoryName, 
+                                        _stpCategoryHelp, 
+                    PerformanceCounterCategoryType.MultiInstance,
+                                        counters);
+                                        
+                        }
+                }
  
-        // Properties
-        public string Name
+                // Properties
+                public static STPPerformanceCounters Instance
+                {
+                        get
+                        {
+                                return _instance;
+                        }
+                }
+        }
+
+        internal class STPInstancePerformanceCounter : IDisposable
+        {
+                // Fields
+        private bool _isDisposed;
+                private PerformanceCounter _pcs;
+
+                // Methods
+                protected STPInstancePerformanceCounter()
+                {
+            _isDisposed = false;
+                }
+
+                public STPInstancePerformanceCounter(
+                        string instance, 
+                        STPPerformanceCounterType spcType) : this()
+                {
+                        STPPerformanceCounters counters = STPPerformanceCounters.Instance;
+                        _pcs = new PerformanceCounter(
+                                STPPerformanceCounters._stpCategoryName, 
+                                counters._stpPerformanceCounters[(int) spcType].Name, 
+                                instance, 
+                                false);
+                        _pcs.RawValue = _pcs.RawValue;
+                }
+
+
+                public void Close()
+                {
+                        if (_pcs != null)
+                        {
+                                _pcs.RemoveInstance();
+                                _pcs.Close();
+                                _pcs = null;
+                        }
+                }
+ 
+                public void Dispose()
+                {
+            Dispose(true);
+                }
+
+        public virtual void Dispose(bool disposing)
         {
-            get
+            if (!_isDisposed)
             {
-                return _counterName;
+                if (disposing)
+                {
+                    Close();
+                }
             }
-        }
-    }
-
-    internal class STPPerformanceCounters
-    {
-        // Fields
-        internal STPPerformanceCounter[] _stpPerformanceCounters;
-        private static STPPerformanceCounters _instance;
-        internal const string _stpCategoryHelp = "SmartThreadPool performance counters";
-        internal const string _stpCategoryName = "SmartThreadPool";
-
-        // Methods
-        static STPPerformanceCounters()
-        {
-            _instance = new STPPerformanceCounters();
+            _isDisposed = true;
         }
  
-        private STPPerformanceCounters()
-        {
-            STPPerformanceCounter[] stpPerformanceCounters = new STPPerformanceCounter[] 
-                { 
-                    new STPPerformanceCounter("Active threads", "The current number of available in the thread pool.", PerformanceCounterType.NumberOfItems32), 
-                    new STPPerformanceCounter("In use threads", "The current number of threads that execute a work item.", PerformanceCounterType.NumberOfItems32), 
-                    new STPPerformanceCounter("Overhead threads", "The current number of threads that are active, but are not in use.", PerformanceCounterType.NumberOfItems32), 
-                    new STPPerformanceCounter("% overhead threads", "The current number of threads that are active, but are not in use in percents.", PerformanceCounterType.RawFraction), 
-                    new STPPerformanceCounter("% overhead threads base", "The current number of threads that are active, but are not in use in percents.", PerformanceCounterType.RawBase), 
-
-                    new STPPerformanceCounter("Work Items", "The number of work items in the Smart Thread Pool. Both queued and processed.", PerformanceCounterType.NumberOfItems32), 
-                    new STPPerformanceCounter("Work Items in queue", "The current number of work items in the queue", PerformanceCounterType.NumberOfItems32), 
-                    new STPPerformanceCounter("Work Items processed", "The number of work items already processed", PerformanceCounterType.NumberOfItems32), 
-
-                    new STPPerformanceCounter("Work Items queued/sec", "The number of work items queued per second", PerformanceCounterType.RateOfCountsPerSecond32), 
-                    new STPPerformanceCounter("Work Items processed/sec", "The number of work items processed per second", PerformanceCounterType.RateOfCountsPerSecond32), 
-
-                    new STPPerformanceCounter("Avg. Work Item wait time/sec", "The average time a work item supends in the queue waiting for its turn to execute.", PerformanceCounterType.AverageCount64), 
-                    new STPPerformanceCounter("Avg. Work Item wait time base", "The average time a work item supends in the queue waiting for its turn to execute.", PerformanceCounterType.AverageBase), 
+                public virtual void Increment()
+                {
+                        _pcs.Increment();
+                }
+ 
+                public virtual void IncrementBy(long val)
+                {
+                        _pcs.IncrementBy(val);
+                }
+
+                public virtual void Set(long val)
+                {
+                        _pcs.RawValue = val;
+                }
+        }
+
+        internal class STPInstanceNullPerformanceCounter : STPInstancePerformanceCounter
+        {
+                // Methods
+                public override void Increment() {}
+                public override void IncrementBy(long value) {}
+                public override void Set(long val) {}
+        }
+
+
+
+        internal class STPInstancePerformanceCounters : ISTPInstancePerformanceCounters
+        {
+        private bool _isDisposed;
+                // Fields
+                private STPInstancePerformanceCounter[] _pcs;
+                private static readonly STPInstancePerformanceCounter _stpInstanceNullPerformanceCounter;
+
+                // Methods
+                static STPInstancePerformanceCounters()
+                {
+                        _stpInstanceNullPerformanceCounter = new STPInstanceNullPerformanceCounter();
+                }
+ 
+                public STPInstancePerformanceCounters(string instance)
+                {
+            _isDisposed = false;
+                        _pcs = new STPInstancePerformanceCounter[(int)STPPerformanceCounterType.LastCounter];
+
+            // Call the STPPerformanceCounters.Instance so the static constructor will
+            // intialize the STPPerformanceCounters singleton.
+                        STPPerformanceCounters.Instance.GetHashCode();
+
+                        for (int i = 0; i < _pcs.Length; i++)
+                        {
+                                if (instance != null)
+                                {
+                                        _pcs[i] = new STPInstancePerformanceCounter(
+                                                instance, 
+                                                (STPPerformanceCounterType) i);
+                                }
+                                else
+                                {
+                                        _pcs[i] = _stpInstanceNullPerformanceCounter;
+                                }
+                        }
+                }
+ 
 
-                    new STPPerformanceCounter("Avg. Work Item process time/sec", "The average time it takes to process a work item.", PerformanceCounterType.AverageCount64), 
-                    new STPPerformanceCounter("Avg. Work Item process time base", "The average time it takes to process a work item.", PerformanceCounterType.AverageBase), 
+                public void Close()
+                {
+                        if (null != _pcs)
+                        {
+                                for (int i = 0; i < _pcs.Length; i++)
+                                {
+                    if (null != _pcs[i])
+                    {
+                        _pcs[i].Dispose();
+                    }
+                                }
+                                _pcs = null;
+                        }
+                }
 
-                    new STPPerformanceCounter("Work Items Groups", "The current number of work item groups associated with the Smart Thread Pool.", PerformanceCounterType.NumberOfItems32), 
-                };
+                public void Dispose()
+                {
+            Dispose(true);
+                }
 
-            _stpPerformanceCounters = stpPerformanceCounters;
-            SetupCategory();
-        }
- 
-        private void SetupCategory()
+        public virtual void Dispose(bool disposing)
         {
-            if (!PerformanceCounterCategory.Exists(_stpCategoryName))
+            if (!_isDisposed)
             {
-                CounterCreationDataCollection counters = new CounterCreationDataCollection();
-
-                for (int i = 0; i < _stpPerformanceCounters.Length; i++)
+                if (disposing)
                 {
-                    _stpPerformanceCounters[i].AddCounterToCollection(counters);
+                    Close();
                 }
-
-
-                // *********** Remark for .NET 2.0 ***********
-                // If you are here, it means you got the warning that this overload
-                // of the method is deprecated in .NET 2.0. To use the correct 
-                // method overload, uncomment the third argument of
-                // the method.
-                #pragma warning disable 0618
-                PerformanceCounterCategory.Create(
-                    _stpCategoryName, 
-                    _stpCategoryHelp, 
-                    //PerformanceCounterCategoryType.MultiInstance,
-                    counters);
-                #pragma warning restore 0618
             }
+            _isDisposed = true;
         }
  
-        // Properties
-        public static STPPerformanceCounters Instance
-        {
-            get
-            {
-                return _instance;
-            }
-        }
-     }
+                private STPInstancePerformanceCounter GetCounter(STPPerformanceCounterType spcType)
+                {
+                        return _pcs[(int) spcType];
+                }
+
+                public void SampleThreads(long activeThreads, long inUseThreads)
+                {
+                        GetCounter(STPPerformanceCounterType.ActiveThreads).Set(activeThreads);
+                        GetCounter(STPPerformanceCounterType.InUseThreads).Set(inUseThreads);
+                        GetCounter(STPPerformanceCounterType.OverheadThreads).Set(activeThreads-inUseThreads);
+
+                        GetCounter(STPPerformanceCounterType.OverheadThreadsPercentBase).Set(activeThreads-inUseThreads);
+                        GetCounter(STPPerformanceCounterType.OverheadThreadsPercent).Set(inUseThreads);
+                }
+
+                public void SampleWorkItems(long workItemsQueued, long workItemsProcessed)
+                {
+                        GetCounter(STPPerformanceCounterType.WorkItems).Set(workItemsQueued+workItemsProcessed);
+                        GetCounter(STPPerformanceCounterType.WorkItemsInQueue).Set(workItemsQueued);
+                        GetCounter(STPPerformanceCounterType.WorkItemsProcessed).Set(workItemsProcessed);
+
+                        GetCounter(STPPerformanceCounterType.WorkItemsQueuedPerSecond).Set(workItemsQueued);
+                        GetCounter(STPPerformanceCounterType.WorkItemsProcessedPerSecond).Set(workItemsProcessed);
+                }
+
+                public void SampleWorkItemsWaitTime(TimeSpan workItemWaitTime)
+                {
+                        GetCounter(STPPerformanceCounterType.AvgWorkItemWaitTime).IncrementBy((long)workItemWaitTime.TotalMilliseconds);
+                        GetCounter(STPPerformanceCounterType.AvgWorkItemWaitTimeBase).Increment();
+                }
+
+                public void SampleWorkItemsProcessTime(TimeSpan workItemProcessTime)
+                {
+                        GetCounter(STPPerformanceCounterType.AvgWorkItemProcessTime).IncrementBy((long)workItemProcessTime.TotalMilliseconds);
+                        GetCounter(STPPerformanceCounterType.AvgWorkItemProcessTimeBase).Increment();
+                }
+    }
+#endif
 
-    internal class STPInstancePerformanceCounter : IDisposable
-    {
-        // Fields
-        private PerformanceCounter _pcs;
+    internal class NullSTPInstancePerformanceCounters : ISTPInstancePerformanceCounters, ISTPPerformanceCountersReader
+        {
+                private static readonly NullSTPInstancePerformanceCounters _instance = new NullSTPInstancePerformanceCounters();
 
-        // Methods
-        protected STPInstancePerformanceCounter()
-        {
-        }
+                public static NullSTPInstancePerformanceCounters Instance
+                {
+                        get { return _instance; }
+                }
 
-        public STPInstancePerformanceCounter(
-            string instance, 
-            STPPerformanceCounterType spcType)
+                public void Close() {}
+                public void Dispose() {}
+ 
+                public void SampleThreads(long activeThreads, long inUseThreads) {}
+                public void SampleWorkItems(long workItemsQueued, long workItemsProcessed) {}
+                public void SampleWorkItemsWaitTime(TimeSpan workItemWaitTime) {}
+                public void SampleWorkItemsProcessTime(TimeSpan workItemProcessTime) {}
+        public long InUseThreads
         {
-            STPPerformanceCounters counters = STPPerformanceCounters.Instance;
-            _pcs = new PerformanceCounter(
-                STPPerformanceCounters._stpCategoryName, 
-                counters._stpPerformanceCounters[(int) spcType].Name, 
-                instance, 
-                false);
-            _pcs.RawValue = _pcs.RawValue;
+            get { return 0; }
         }
 
-        ~STPInstancePerformanceCounter()
+        public long ActiveThreads
         {
-            Close();
+            get { return 0; }
         }
 
-        public void Close()
-        {
-            if (_pcs != null)
-            {
-                _pcs.RemoveInstance();
-                _pcs.Close();
-                _pcs = null;
-            }
-        }
- 
-        public void Dispose()
+        public long WorkItemsQueued
         {
-            Close();
-            GC.SuppressFinalize(this);
-        }
- 
-        public virtual void Increment()
-        {
-            _pcs.Increment();
-        }
- 
-        public virtual void IncrementBy(long val)
-        {
-            _pcs.IncrementBy(val);
+            get { return 0; }
         }
 
-        public virtual void Set(long val)
+        public long WorkItemsProcessed
         {
-            _pcs.RawValue = val;
+            get { return 0; }
         }
-    }
+        }
 
-    internal class STPInstanceNullPerformanceCounter : STPInstancePerformanceCounter
+    internal class LocalSTPInstancePerformanceCounters : ISTPInstancePerformanceCounters, ISTPPerformanceCountersReader
     {
-        // Methods
-        public STPInstanceNullPerformanceCounter() {}
-        public override void Increment() {}
-        public override void IncrementBy(long value) {}
-        public override void Set(long val) {}
-    }
-        
-    internal interface ISTPInstancePerformanceCounters : IDisposable
-    {
-        void Close();
-        void SampleThreads(long activeThreads, long inUseThreads);
-        void SampleWorkItems(long workItemsQueued, long workItemsProcessed);
-        void SampleWorkItemsWaitTime(TimeSpan workItemWaitTime);
-        void SampleWorkItemsProcessTime(TimeSpan workItemProcessTime);
-    }
+        public void Close() { }
+        public void Dispose() { }
 
+        private long _activeThreads;
+        private long _inUseThreads;
+        private long _workItemsQueued;
+        private long _workItemsProcessed;
 
-    internal class STPInstancePerformanceCounters : ISTPInstancePerformanceCounters, IDisposable
-    {
-        // Fields
-        private STPInstancePerformanceCounter[] _pcs;
-        private static STPInstancePerformanceCounter _stpInstanceNullPerformanceCounter;
-
-        // Methods
-        static STPInstancePerformanceCounters()
+        public long InUseThreads
         {
-            _stpInstanceNullPerformanceCounter = new STPInstanceNullPerformanceCounter();
-        }
- 
-        public STPInstancePerformanceCounters(string instance)
-        {
-            _pcs = new STPInstancePerformanceCounter[(int)STPPerformanceCounterType.LastCounter];
-            // STPPerformanceCounters counters = STPPerformanceCounters.Instance;
-            for (int i = 0; i < _pcs.Length; i++)
-            {
-                if (instance != null)
-                {
-                    _pcs[i] = new STPInstancePerformanceCounter(
-                        instance, 
-                        (STPPerformanceCounterType) i);
-                }
-                else
-                {
-                    _pcs[i] = _stpInstanceNullPerformanceCounter;
-                }
-            }
+            get { return _inUseThreads; }
         }
- 
 
-        public void Close()
+        public long ActiveThreads
         {
-            if (null != _pcs)
-            {
-                for (int i = 0; i < _pcs.Length; i++)
-                {
-                    if (null != _pcs[i])
-                    {
-                        _pcs[i].Close();
-                    }
-                }
-                _pcs = null;
-            }
+            get { return _activeThreads; }
         }
 
-        ~STPInstancePerformanceCounters()
+        public long WorkItemsQueued
         {
-            Close();
+            get { return _workItemsQueued; }
         }
 
-        public void Dispose()
-        {
-            Close();
-            GC.SuppressFinalize(this);
-        }
- 
-        private STPInstancePerformanceCounter GetCounter(STPPerformanceCounterType spcType)
+        public long WorkItemsProcessed
         {
-            return _pcs[(int) spcType];
+            get { return _workItemsProcessed; }
         }
 
         public void SampleThreads(long activeThreads, long inUseThreads)
         {
-            GetCounter(STPPerformanceCounterType.ActiveThreads).Set(activeThreads);
-            GetCounter(STPPerformanceCounterType.InUseThreads).Set(inUseThreads);
-            GetCounter(STPPerformanceCounterType.OverheadThreads).Set(activeThreads-inUseThreads);
-
-            GetCounter(STPPerformanceCounterType.OverheadThreadsPercentBase).Set(activeThreads-inUseThreads);
-            GetCounter(STPPerformanceCounterType.OverheadThreadsPercent).Set(inUseThreads);
+            _activeThreads = activeThreads;
+            _inUseThreads = inUseThreads;
         }
 
         public void SampleWorkItems(long workItemsQueued, long workItemsProcessed)
         {
-            GetCounter(STPPerformanceCounterType.WorkItems).Set(workItemsQueued+workItemsProcessed);
-            GetCounter(STPPerformanceCounterType.WorkItemsInQueue).Set(workItemsQueued);
-            GetCounter(STPPerformanceCounterType.WorkItemsProcessed).Set(workItemsProcessed);
-
-            GetCounter(STPPerformanceCounterType.WorkItemsQueuedPerSecond).Set(workItemsQueued);
-            GetCounter(STPPerformanceCounterType.WorkItemsProcessedPerSecond).Set(workItemsProcessed);
+            _workItemsQueued = workItemsQueued;
+            _workItemsProcessed = workItemsProcessed;
         }
 
         public void SampleWorkItemsWaitTime(TimeSpan workItemWaitTime)
         {
-            GetCounter(STPPerformanceCounterType.AvgWorkItemWaitTime).IncrementBy((long)workItemWaitTime.TotalMilliseconds);
-            GetCounter(STPPerformanceCounterType.AvgWorkItemWaitTimeBase).Increment();
+            // Not supported
         }
 
         public void SampleWorkItemsProcessTime(TimeSpan workItemProcessTime)
         {
-            GetCounter(STPPerformanceCounterType.AvgWorkItemProcessTime).IncrementBy((long)workItemProcessTime.TotalMilliseconds);
-            GetCounter(STPPerformanceCounterType.AvgWorkItemProcessTimeBase).Increment();
-        }
-    }
-
-    internal class NullSTPInstancePerformanceCounters : ISTPInstancePerformanceCounters, IDisposable
-    {
-        static NullSTPInstancePerformanceCounters()
-        {
+            // Not supported
         }
-
-        private static NullSTPInstancePerformanceCounters _instance = new NullSTPInstancePerformanceCounters(null);
-
-        public static NullSTPInstancePerformanceCounters Instance
-        {
-            get { return _instance; }
-        }
-
-        public NullSTPInstancePerformanceCounters(string instance) {}
-         public void Close() {}
-        public void Dispose() {}
- 
-        public void SampleThreads(long activeThreads, long inUseThreads) {}
-        public void SampleWorkItems(long workItemsQueued, long workItemsProcessed) {}
-        public void SampleWorkItemsWaitTime(TimeSpan workItemWaitTime) {}
-        public void SampleWorkItemsProcessTime(TimeSpan workItemProcessTime) {}
     }
-
 }
diff --git a/ThirdParty/SmartThreadPool/STPStartInfo.cs b/ThirdParty/SmartThreadPool/STPStartInfo.cs
index fa9ceb4..96fa094 100644
--- a/ThirdParty/SmartThreadPool/STPStartInfo.cs
+++ b/ThirdParty/SmartThreadPool/STPStartInfo.cs
@@ -1,113 +1,212 @@
-// Ami Bar
-// amibar@gmail.com
-
+using System;
 using System.Threading;
 
 namespace Amib.Threading
 {
-    /// <summary>
-    /// Summary description for STPStartInfo.
-    /// </summary>
+        /// <summary>
+        /// Summary description for STPStartInfo.
+        /// </summary>
     public class STPStartInfo : WIGStartInfo
     {
-        /// <summary>
-        /// Idle timeout in milliseconds.
-        /// If a thread is idle for _idleTimeout milliseconds then 
-        /// it may quit.
-        /// </summary>
-        private int _idleTimeout;
-
-        /// <summary>
-        /// The lower limit of threads in the pool.
-        /// </summary>
-        private int _minWorkerThreads;
-
-        /// <summary>
-        /// The upper limit of threads in the pool.
-        /// </summary>
-        private int _maxWorkerThreads;
-
-        /// <summary>
-        /// The priority of the threads in the pool
-        /// </summary>
-        private ThreadPriority _threadPriority;
-
-        /// <summary>
-        /// The thread pool name. Threads will get names depending on this.
-        /// </summary>
-        private string _threadPoolName;
-
-        /// <summary>
-        /// If this field is not null then the performance counters are enabled
-        /// and use the string as the name of the instance.
-        /// </summary>
-        private string _pcInstanceName;
-
-        private int _stackSize;
-
-        public STPStartInfo() : base()
+        private int _idleTimeout = SmartThreadPool.DefaultIdleTimeout;
+        private int _minWorkerThreads = SmartThreadPool.DefaultMinWorkerThreads;
+        private int _maxWorkerThreads = SmartThreadPool.DefaultMaxWorkerThreads;
+#if !(WINDOWS_PHONE)
+        private ThreadPriority _threadPriority = SmartThreadPool.DefaultThreadPriority;
+#endif
+        private string _performanceCounterInstanceName = SmartThreadPool.DefaultPerformanceCounterInstanceName;
+        private bool _areThreadsBackground = SmartThreadPool.DefaultAreThreadsBackground;
+        private bool _enableLocalPerformanceCounters;
+        private string _threadPoolName = SmartThreadPool.DefaultThreadPoolName;
+        private int? _maxStackSize = SmartThreadPool.DefaultMaxStackSize;
+
+        public STPStartInfo()
         {
+            _performanceCounterInstanceName = SmartThreadPool.DefaultPerformanceCounterInstanceName;
+#if !(WINDOWS_PHONE)
+            _threadPriority = SmartThreadPool.DefaultThreadPriority;
+#endif
+            _maxWorkerThreads = SmartThreadPool.DefaultMaxWorkerThreads;
             _idleTimeout = SmartThreadPool.DefaultIdleTimeout;
             _minWorkerThreads = SmartThreadPool.DefaultMinWorkerThreads;
-            _maxWorkerThreads = SmartThreadPool.DefaultMaxWorkerThreads;
-            _threadPriority = SmartThreadPool.DefaultThreadPriority;
-            _threadPoolName = SmartThreadPool.DefaultThreadPoolName;
-            _pcInstanceName = SmartThreadPool.DefaultPerformanceCounterInstanceName;
-            _stackSize = SmartThreadPool.DefaultStackSize;
         }
 
-        public STPStartInfo(STPStartInfo stpStartInfo) : base(stpStartInfo)
+            public STPStartInfo(STPStartInfo stpStartInfo)
+            : base(stpStartInfo)
         {
-            _idleTimeout = stpStartInfo._idleTimeout;
-            _minWorkerThreads = stpStartInfo._minWorkerThreads;
-            _maxWorkerThreads = stpStartInfo._maxWorkerThreads;
-            _threadPriority = stpStartInfo._threadPriority;
+            _idleTimeout = stpStartInfo.IdleTimeout;
+            _minWorkerThreads = stpStartInfo.MinWorkerThreads;
+            _maxWorkerThreads = stpStartInfo.MaxWorkerThreads;
+#if !(WINDOWS_PHONE)
+            _threadPriority = stpStartInfo.ThreadPriority;
+#endif
+            _performanceCounterInstanceName = stpStartInfo.PerformanceCounterInstanceName;
+            _enableLocalPerformanceCounters = stpStartInfo._enableLocalPerformanceCounters;
             _threadPoolName = stpStartInfo._threadPoolName;
-            _pcInstanceName = stpStartInfo._pcInstanceName;
-            _stackSize = stpStartInfo._stackSize;
+            _areThreadsBackground = stpStartInfo.AreThreadsBackground;
+#if !(_SILVERLIGHT) && !(WINDOWS_PHONE)
+            _apartmentState = stpStartInfo._apartmentState;
+#endif
         }
-
-        public int IdleTimeout
-        {
-            get { return _idleTimeout; }
-            set { _idleTimeout = value; }
+          
+            /// <summary>
+            /// Get/Set the idle timeout in milliseconds.
+            /// If a thread is idle (starved) longer than IdleTimeout then it may quit.
+            /// </summary>
+            public virtual int IdleTimeout
+            {
+                get { return _idleTimeout; }
+                set 
+            {
+                ThrowIfReadOnly();
+                _idleTimeout = value; 
+            }
+            }
+
+
+            /// <summary>
+            /// Get/Set the lower limit of threads in the pool.
+            /// </summary>
+            public virtual int MinWorkerThreads
+            {
+                get { return _minWorkerThreads; }
+                set 
+            {
+                ThrowIfReadOnly();
+                _minWorkerThreads = value; 
+            }
+            }
+
+
+            /// <summary>
+            /// Get/Set the upper limit of threads in the pool.
+            /// </summary>
+            public virtual int MaxWorkerThreads
+            {
+                get { return _maxWorkerThreads; }
+                set 
+            {
+                ThrowIfReadOnly();
+                _maxWorkerThreads = value; 
+            }
+            }
+
+#if !(WINDOWS_PHONE)
+            /// <summary>
+            /// Get/Set the scheduling priority of the threads in the pool.
+            /// The Os handles the scheduling.
+            /// </summary>
+            public virtual ThreadPriority ThreadPriority
+            {
+                get { return _threadPriority; }
+                set 
+            {
+                ThrowIfReadOnly();
+                _threadPriority = value; 
+            }
+            }
+#endif
+        /// <summary>
+        /// Get/Set the thread pool name. Threads will get names depending on this.
+        /// </summary>
+        public virtual string ThreadPoolName {
+            get { return _threadPoolName; }
+            set
+            {
+                ThrowIfReadOnly ();
+                _threadPoolName = value;
+            }
         }
 
-        public int MinWorkerThreads
-        {
-            get { return _minWorkerThreads; }
-            set { _minWorkerThreads = value; }
-        }
+            /// <summary>
+            /// Get/Set the performance counter instance name of this SmartThreadPool
+            /// The default is null which indicate not to use performance counters at all.
+            /// </summary>
+            public virtual string PerformanceCounterInstanceName
+            {
+                get { return _performanceCounterInstanceName; }
+                set 
+            {
+                ThrowIfReadOnly();
+                _performanceCounterInstanceName = value; 
+            }
+            }
 
-        public int MaxWorkerThreads
-        {
-            get { return _maxWorkerThreads; }
-            set { _maxWorkerThreads = value; }
-        }
+        /// <summary>
+        /// Enable/Disable the local performance counter.
+        /// This enables the user to get some performance information about the SmartThreadPool 
+        /// without using Windows performance counters. (Useful on WindowsCE, Silverlight, etc.)
+        /// The default is false.
+        /// </summary>
+        public virtual bool EnableLocalPerformanceCounters
+            {
+                get { return _enableLocalPerformanceCounters; }
+                set 
+                        { 
+                                ThrowIfReadOnly(); 
+                                _enableLocalPerformanceCounters = value; 
+                        }
+            }
 
-        public ThreadPriority ThreadPriority
+        /// <summary>
+        /// Get/Set backgroundness of thread in thread pool.
+        /// </summary>
+            public virtual bool AreThreadsBackground
+            {
+                get { return _areThreadsBackground; }
+                set
+                {
+                    ThrowIfReadOnly ();
+                    _areThreadsBackground = value;
+                }
+            }
+
+            /// <summary>
+        /// Get a readonly version of this STPStartInfo.
+        /// </summary>
+        /// <returns>Returns a readonly reference to this STPStartInfo</returns>
+        public new STPStartInfo AsReadOnly()
         {
-            get { return _threadPriority; }
-            set { _threadPriority = value; }
+            return new STPStartInfo(this) { _readOnly = true };
         }
 
-        public virtual string ThreadPoolName
-        {
-            get { return _threadPoolName; }
-            set { _threadPoolName = value; }
-        }
+#if !(_SILVERLIGHT) && !(WINDOWS_PHONE)
 
+        private ApartmentState _apartmentState = SmartThreadPool.DefaultApartmentState;
 
-        public string PerformanceCounterInstanceName
+        /// <summary>
+        /// Get/Set the apartment state of threads in the thread pool
+        /// </summary>
+        public ApartmentState ApartmentState
         {
-            get { return _pcInstanceName; }
-            set { _pcInstanceName = value; }
-        }
-
-        public int StackSize
+            get { return _apartmentState; }
+            set
+            {
+                ThrowIfReadOnly();
+                _apartmentState = value;
+            }
+        } 
+
+#if !(_SILVERLIGHT) && !(WINDOWS_PHONE)
+        
+        /// <summary>
+        /// Get/Set the max stack size of threads in the thread pool
+        /// </summary>
+        public int? MaxStackSize
         {
-            get { return _stackSize; }
-            set { _stackSize = value; }
+            get { return _maxStackSize; }
+            set
+            {
+                ThrowIfReadOnly();
+                if (value.HasValue && value.Value < 0)
+                {
+                    throw new ArgumentOutOfRangeException("value", "Value must be greater than 0.");
+                }
+                _maxStackSize = value;
+            }
         }
+#endif
+
+#endif
     }
 }
diff --git a/ThirdParty/SmartThreadPool/SmartThreadPool.ThreadEntry.cs b/ThirdParty/SmartThreadPool/SmartThreadPool.ThreadEntry.cs
new file mode 100644
index 0000000..d9502bb
--- /dev/null
+++ b/ThirdParty/SmartThreadPool/SmartThreadPool.ThreadEntry.cs
@@ -0,0 +1,60 @@
+
+using System;
+using Amib.Threading.Internal;
+
+namespace Amib.Threading
+{
+    public partial class SmartThreadPool
+    {
+        #region ThreadEntry class
+
+        internal class ThreadEntry
+        {
+            /// <summary>
+            /// The thread creation time
+            /// The value is stored as UTC value.
+            /// </summary>
+            private readonly DateTime _creationTime;
+
+            /// <summary>
+            /// The last time this thread has been running
+            /// It is updated by IAmAlive() method
+            /// The value is stored as UTC value.
+            /// </summary>
+            private DateTime _lastAliveTime;
+
+            /// <summary>
+            /// A reference from each thread in the thread pool to its SmartThreadPool
+            /// object container.
+            /// With this variable a thread can know whatever it belongs to a 
+            /// SmartThreadPool.
+            /// </summary>
+            private readonly SmartThreadPool _associatedSmartThreadPool;
+
+            /// <summary>
+            /// A reference to the current work item a thread from the thread pool 
+            /// is executing.
+            /// </summary>            
+            public WorkItem CurrentWorkItem { get; set; }
+
+            public ThreadEntry(SmartThreadPool stp)
+            {
+                _associatedSmartThreadPool = stp;
+                _creationTime = DateTime.UtcNow;
+                _lastAliveTime = DateTime.MinValue;
+            }
+
+            public SmartThreadPool AssociatedSmartThreadPool
+            {
+                get { return _associatedSmartThreadPool; }
+            }
+
+            public void IAmAlive()
+            {
+                _lastAliveTime = DateTime.UtcNow;
+            }
+        }
+
+        #endregion
+    }
+}
\ No newline at end of file
diff --git a/ThirdParty/SmartThreadPool/SmartThreadPool.cs b/ThirdParty/SmartThreadPool/SmartThreadPool.cs
index 19a0007..615518e 100644
--- a/ThirdParty/SmartThreadPool/SmartThreadPool.cs
+++ b/ThirdParty/SmartThreadPool/SmartThreadPool.cs
@@ -1,61 +1,106 @@
-// Ami Bar
-// amibar@gmail.com
-//
-// Smart thread pool in C#.
+#region Release History
+
+// Smart Thread Pool
 // 7 Aug 2004 - Initial release
+//
 // 14 Sep 2004 - Bug fixes 
+//
 // 15 Oct 2004 - Added new features
-//        - Work items return result.
-//        - Support waiting synchronization for multiple work items.
-//        - Work items can be cancelled.
-//        - Passage of the caller thread’s context to the thread in the pool.
-//        - Minimal usage of WIN32 handles.
-//        - Minor bug fixes.
+//              - Work items return result.
+//              - Support waiting synchronization for multiple work items.
+//              - Work items can be cancelled.
+//              - Passage of the caller thread’s context to the thread in the pool.
+//              - Minimal usage of WIN32 handles.
+//              - Minor bug fixes.
+//
 // 26 Dec 2004 - Changes:
-//        - Removed static constructors.
+//              - Removed static constructors.
 //      - Added finalizers.
-//        - Changed Exceptions so they are serializable.
-//        - Fixed the bug in one of the SmartThreadPool constructors.
-//        - Changed the SmartThreadPool.WaitAll() so it will support any number of waiters. 
+//              - Changed Exceptions so they are serializable.
+//              - Fixed the bug in one of the SmartThreadPool constructors.
+//              - Changed the SmartThreadPool.WaitAll() so it will support any number of waiters. 
 //        The SmartThreadPool.WaitAny() is still limited by the .NET Framework.
-//        - Added PostExecute with options on which cases to call it.
+//              - Added PostExecute with options on which cases to call it.
 //      - Added option to dispose of the state objects.
 //      - Added a WaitForIdle() method that waits until the work items queue is empty.
 //      - Added an STPStartInfo class for the initialization of the thread pool.
 //      - Changed exception handling so if a work item throws an exception it 
 //        is rethrown at GetResult(), rather then firing an UnhandledException event.
 //        Note that PostExecute exception are always ignored.
+//
 // 25 Mar 2005 - Changes:
-//        - Fixed lost of work items bug
+//              - Fixed lost of work items bug
+//
 // 3 Jul 2005: Changes.
 //      - Fixed bug where Enqueue() throws an exception because PopWaiter() returned null, hardly reconstructed. 
+//
 // 16 Aug 2005: Changes.
-//        - Fixed bug where the InUseThreads becomes negative when canceling work items. 
+//              - Fixed bug where the InUseThreads becomes negative when canceling work items. 
 //
 // 31 Jan 2006 - Changes:
-//        - Added work items priority
-//        - Removed support of chained delegates in callbacks and post executes (nobody really use this)
-//        - Added work items groups
-//        - Added work items groups idle event
-//        - Changed SmartThreadPool.WaitAll() behavior so when it gets empty array
-//          it returns true rather then throwing an exception.
-//        - Added option to start the STP and the WIG as suspended
-//        - Exception behavior changed, the real exception is returned by an 
-//          inner exception
-//        - Added option to keep the Http context of the caller thread. (Thanks to Steven T.)
-//        - Added performance counters
-//        - Added priority to the threads in the pool
+//              - Added work items priority
+//              - Removed support of chained delegates in callbacks and post executes (nobody really use this)
+//              - Added work items groups
+//              - Added work items groups idle event
+//              - Changed SmartThreadPool.WaitAll() behavior so when it gets empty array
+//                it returns true rather then throwing an exception.
+//              - Added option to start the STP and the WIG as suspended
+//              - Exception behavior changed, the real exception is returned by an 
+//                inner exception
+//              - Added option to keep the Http context of the caller thread. (Thanks to Steven T.)
+//              - Added performance counters
+//              - Added priority to the threads in the pool
 //
 // 13 Feb 2006 - Changes:
-//        - Added a call to the dispose of the Performance Counter so
-//          their won't be a Performance Counter leak.
-//        - Added exception catch in case the Performance Counters cannot 
-//          be created.
+//              - Added a call to the dispose of the Performance Counter so
+//                their won't be a Performance Counter leak.
+//              - Added exception catch in case the Performance Counters cannot 
+//                be created.
+//
+// 17 May 2008 - Changes:
+//      - Changed the dispose behavior and removed the Finalizers.
+//      - Enabled the change of the MaxThreads and MinThreads at run time.
+//      - Enabled the change of the Concurrency of a IWorkItemsGroup at run 
+//        time If the IWorkItemsGroup is a SmartThreadPool then the Concurrency 
+//        refers to the MaxThreads. 
+//      - Improved the cancel behavior.
+//      - Added events for thread creation and termination. 
+//      - Fixed the HttpContext context capture.
+//      - Changed internal collections so they use generic collections
+//      - Added IsIdle flag to the SmartThreadPool and IWorkItemsGroup
+//      - Added support for WinCE
+//      - Added support for Action<T> and Func<T>
+//
+// 07 April 2009 - Changes:
+//      - Added support for Silverlight and Mono
+//      - Added Join, Choice, and Pipe to SmartThreadPool.
+//      - Added local performance counters (for Mono, Silverlight, and WindowsCE)
+//      - Changed duration measures from DateTime.Now to Stopwatch.
+//      - Queues changed from System.Collections.Queue to System.Collections.Generic.LinkedList<T>.
+//
+// 21 December 2009 - Changes:
+//      - Added work item timeout (passive)
+//
+// 20 August 2012 - Changes:
+//      - Added set name to threads
+//      - Fixed the WorkItemsQueue.Dequeue. 
+//        Replaced while (!Monitor.TryEnter(this)); with lock(this) { ... }
+//      - Fixed SmartThreadPool.Pipe
+//      - Added IsBackground option to threads
+//      - Added ApartmentState to threads
+//      - Fixed thread creation when queuing many work items at the same time.
+//
+// 24 August 2012 - Changes:
+//      - Enabled cancel abort after cancel. See: http://smartthreadpool.codeplex.com/discussions/345937 by alecswan
+//      - Added option to set MaxStackSize of threads 
+
+#endregion
 
 using System;
 using System.Security;
 using System.Threading;
 using System.Collections;
+using System.Collections.Generic;
 using System.Diagnostics;
 using System.Runtime.CompilerServices;
 
@@ -63,1213 +108,1503 @@ using Amib.Threading.Internal;
 
 namespace Amib.Threading
 {
-    #region SmartThreadPool class
-    /// <summary>
-    /// Smart thread pool class.
-    /// </summary>
-    public class SmartThreadPool : IWorkItemsGroup, IDisposable
-    {
-        #region Default Constants
-
-        /// <summary>
-        /// Default minimum number of threads the thread pool contains. (0)
-        /// </summary>
-        public const int DefaultMinWorkerThreads = 0;
-
-        /// <summary>
-        /// Default maximum number of threads the thread pool contains. (25)
-        /// </summary>
-        public const int DefaultMaxWorkerThreads = 25;
-
-        /// <summary>
-        /// Default idle timeout in milliseconds. (One minute)
+        #region SmartThreadPool class
+        /// <summary>
+        /// Smart thread pool class.
+        /// </summary>
+        public partial class SmartThreadPool : WorkItemsGroupBase, IDisposable
+        {
+                #region Public Default Constants
+
+                /// <summary>
+                /// Default minimum number of threads the thread pool contains. (0)
+                /// </summary>
+                public const int DefaultMinWorkerThreads = 0;
+
+                /// <summary>
+                /// Default maximum number of threads the thread pool contains. (25)
+                /// </summary>
+                public const int DefaultMaxWorkerThreads = 25;
+
+                /// <summary>
+                /// Default idle timeout in milliseconds. (One minute)
+                /// </summary>
+                public const int DefaultIdleTimeout = 60*1000; // One minute
+
+                /// <summary>
+                /// Indicate to copy the security context of the caller and then use it in the call. (false)
+                /// </summary>
+                public const bool DefaultUseCallerCallContext = false; 
+
+                /// <summary>
+                /// Indicate to copy the HTTP context of the caller and then use it in the call. (false)
+                /// </summary>
+                public const bool DefaultUseCallerHttpContext = false;
+
+                /// <summary>
+                /// Indicate to dispose of the state objects if they support the IDispose interface. (false)
+                /// </summary>
+                public const bool DefaultDisposeOfStateObjects = false; 
+
+                /// <summary>
+        /// The default option to run the post execute (CallToPostExecute.Always)
+                /// </summary>
+                public const CallToPostExecute DefaultCallToPostExecute = CallToPostExecute.Always;
+
+                /// <summary>
+                /// The default post execute method to run. (None)
+                /// When null it means not to call it.
+                /// </summary>
+                public static readonly PostExecuteWorkItemCallback DefaultPostExecuteWorkItemCallback;
+
+                /// <summary>
+        /// The default work item priority (WorkItemPriority.Normal)
+                /// </summary>
+                public const WorkItemPriority DefaultWorkItemPriority = WorkItemPriority.Normal;
+
+                /// <summary>
+                /// The default is to work on work items as soon as they arrive
+                /// and not to wait for the start. (false)
+                /// </summary>
+                public const bool DefaultStartSuspended = false;
+
+                /// <summary>
+        /// The default name to use for the performance counters instance. (null)
+                /// </summary>
+                public static readonly string DefaultPerformanceCounterInstanceName;
+
+#if !(WINDOWS_PHONE)
+
+                /// <summary>
+        /// The default thread priority (ThreadPriority.Normal)
+                /// </summary>
+                public const ThreadPriority DefaultThreadPriority = ThreadPriority.Normal;
+#endif
+        /// <summary>
+        /// The default thread pool name. (SmartThreadPool)
         /// </summary>
-        public const int DefaultIdleTimeout = 60*1000; // One minute
+        public const string DefaultThreadPoolName = "SmartThreadPool";
 
         /// <summary>
-        /// Indicate to copy the security context of the caller and then use it in the call. (false)
+        /// The default Max Stack Size. (SmartThreadPool)
         /// </summary>
-        public const bool DefaultUseCallerCallContext = false; 
+        public static readonly int? DefaultMaxStackSize = null;
 
         /// <summary>
-        /// Indicate to copy the HTTP context of the caller and then use it in the call. (false)
+        /// The default fill state with params. (false)
+        /// It is relevant only to QueueWorkItem of Action&lt;...&gt;/Func&lt;...&gt;
         /// </summary>
-        public const bool DefaultUseCallerHttpContext = false;
+        public const bool DefaultFillStateWithArgs = false;
 
         /// <summary>
-        /// Indicate to dispose of the state objects if they support the IDispose interface. (false)
+        /// The default thread backgroundness. (true)
         /// </summary>
-        public const bool DefaultDisposeOfStateObjects = false; 
+        public const bool DefaultAreThreadsBackground = true;
 
+#if !(_SILVERLIGHT) && !(WINDOWS_PHONE)
         /// <summary>
-        /// The default option to run the post execute
+        /// The default apartment state of a thread in the thread pool. 
+        /// The default is ApartmentState.Unknown which means the STP will not 
+        /// set the apartment of the thread. It will use the .NET default.
         /// </summary>
-        public const CallToPostExecute DefaultCallToPostExecute = CallToPostExecute.Always;
+        public const ApartmentState DefaultApartmentState = ApartmentState.Unknown;
+#endif
 
-        /// <summary>
-        /// The default post execute method to run. 
-        /// When null it means not to call it.
-        /// </summary>
-        public static readonly PostExecuteWorkItemCallback DefaultPostExecuteWorkItemCallback = null;
+                #endregion
 
-        /// <summary>
-        /// The default work item priority
-        /// </summary>
-        public const WorkItemPriority DefaultWorkItemPriority = WorkItemPriority.Normal;
+        #region Member Variables
 
-        /// <summary>
-        /// The default is to work on work items as soon as they arrive
-        /// and not to wait for the start.
-        /// </summary>
-        public const bool DefaultStartSuspended = false;
+                /// <summary>
+                /// Dictionary of all the threads in the thread pool.
+                /// </summary>
+        private readonly SynchronizedDictionary<Thread, ThreadEntry> _workerThreads = new SynchronizedDictionary<Thread, ThreadEntry>();
 
-        /// <summary>
-        /// The default is not to use the performance counters
-        /// </summary>
-        public static readonly string DefaultPerformanceCounterInstanceName = null;
+                /// <summary>
+                /// Queue of work items.
+                /// </summary>
+                private readonly WorkItemsQueue _workItemsQueue = new WorkItemsQueue();
 
-        public static readonly int DefaultStackSize = 0;
+                /// <summary>
+                /// Count the work items handled.
+                /// Used by the performance counter.
+                /// </summary>
+                private int _workItemsProcessed;
 
-        /// <summary>
-        /// The default thread priority
-        /// </summary>
-        public const ThreadPriority DefaultThreadPriority = ThreadPriority.Normal;
+                /// <summary>
+                /// Number of threads that currently work (not idle).
+                /// </summary>
+                private int _inUseWorkerThreads;
 
         /// <summary>
-        /// The default thread pool name
+        /// Stores a copy of the original STPStartInfo.
+        /// It is used to change the MinThread and MaxThreads
         /// </summary>
-        public const string DefaultThreadPoolName = "SmartThreadPool";
+        private STPStartInfo _stpStartInfo;
 
-        #endregion
+                /// <summary>
+                /// Total number of work items that are stored in the work items queue 
+                /// plus the work items that the threads in the pool are working on.
+                /// </summary>
+                private int _currentWorkItemsCount;
 
-        #region Member Variables
+                /// <summary>
+                /// Signaled when the thread pool is idle, i.e. no thread is busy
+                /// and the work items queue is empty
+                /// </summary>
+                //private ManualResetEvent _isIdleWaitHandle = new ManualResetEvent(true);
+                private ManualResetEvent _isIdleWaitHandle = EventWaitHandleFactory.CreateManualResetEvent(true);
 
-        /// <summary>
-        /// Contains the name of this instance of SmartThreadPool.
-        /// Can be changed by the user.
-        /// </summary>
-        private string _name = DefaultThreadPoolName;
+                /// <summary>
+                /// An event to signal all the threads to quit immediately.
+                /// </summary>
+                //private ManualResetEvent _shuttingDownEvent = new ManualResetEvent(false);
+                private ManualResetEvent _shuttingDownEvent = EventWaitHandleFactory.CreateManualResetEvent(false);
 
         /// <summary>
-        /// Hashtable of all the threads in the thread pool.
+        /// A flag to indicate if the Smart Thread Pool is now suspended.
         /// </summary>
-        private Hashtable _workerThreads = Hashtable.Synchronized(new Hashtable());
+        private bool _isSuspended;
 
-        /// <summary>
-        /// Queue of work items.
-        /// </summary>
-        private WorkItemsQueue _workItemsQueue = new WorkItemsQueue();
+                /// <summary>
+                /// A flag to indicate the threads to quit.
+                /// </summary>
+                private bool _shutdown;
 
-        /// <summary>
-        /// Count the work items handled.
-        /// Used by the performance counter.
-        /// </summary>
-        private long _workItemsProcessed = 0;
+                /// <summary>
+                /// Counts the threads created in the pool.
+                /// It is used to name the threads.
+                /// </summary>
+                private int _threadCounter;
 
-        /// <summary>
-        /// Number of threads that currently work (not idle).
-        /// </summary>
-        private int _inUseWorkerThreads = 0;
+                /// <summary>
+                /// Indicate that the SmartThreadPool has been disposed
+                /// </summary>
+                private bool _isDisposed;
 
-        /// <summary>
-        /// Start information to use. 
-        /// It is simpler than providing many constructors.
-        /// </summary>
-        private STPStartInfo _stpStartInfo = new STPStartInfo();
+                /// <summary>
+                /// Holds all the WorkItemsGroup instaces that have at least one 
+                /// work item int the SmartThreadPool
+                /// This variable is used in case of Shutdown
+                /// </summary>
+        private readonly SynchronizedDictionary<IWorkItemsGroup, IWorkItemsGroup> _workItemsGroups = new SynchronizedDictionary<IWorkItemsGroup, IWorkItemsGroup>();
 
         /// <summary>
-        /// Total number of work items that are stored in the work items queue 
-        /// plus the work items that the threads in the pool are working on.
+        /// A common object for all the work items int the STP
+        /// so we can mark them to cancel in O(1)
         /// </summary>
-        private int _currentWorkItemsCount = 0;
+        private CanceledWorkItemsGroup _canceledSmartThreadPool = new CanceledWorkItemsGroup();
 
         /// <summary>
-        /// Signaled when the thread pool is idle, i.e. no thread is busy
-        /// and the work items queue is empty
+        /// Windows STP performance counters
         /// </summary>
-        private ManualResetEvent _isIdleWaitHandle = new ManualResetEvent(true);
+        private ISTPInstancePerformanceCounters _windowsPCs = NullSTPInstancePerformanceCounters.Instance;
 
         /// <summary>
-        /// An event to signal all the threads to quit immediately.
+        /// Local STP performance counters
         /// </summary>
-        private ManualResetEvent _shuttingDownEvent = new ManualResetEvent(false);
+        private ISTPInstancePerformanceCounters _localPCs = NullSTPInstancePerformanceCounters.Instance;
 
-        /// <summary>
-        /// A flag to indicate the threads to quit.
-        /// </summary>
-        private bool _shutdown = false;
 
-        /// <summary>
-        /// Counts the threads created in the pool.
-        /// It is used to name the threads.
-        /// </summary>
-        private int _threadCounter = 0;
+#if (WINDOWS_PHONE) 
+        private static readonly Dictionary<int, ThreadEntry> _threadEntries = new Dictionary<int, ThreadEntry>();
+#elif (_WINDOWS_CE)
+        private static LocalDataStoreSlot _threadEntrySlot = Thread.AllocateDataSlot();
+#else
+        [ThreadStatic]
+        private static ThreadEntry _threadEntry;
 
-        /// <summary>
-        /// Indicate that the SmartThreadPool has been disposed
-        /// </summary>
-        private bool _isDisposed = false;
+#endif
 
         /// <summary>
-        /// Event to send that the thread pool is idle
+        /// An event to call after a thread is created, but before 
+        /// it's first use.
         /// </summary>
-        private event EventHandler _stpIdle;
+        private event ThreadInitializationHandler _onThreadInitialization;
 
         /// <summary>
-        /// On idle event
+        /// An event to call when a thread is about to exit, after 
+        /// it is no longer belong to the pool.
         /// </summary>
-        //private event WorkItemsGroupIdleHandler _onIdle;
+        private event ThreadTerminationHandler _onThreadTermination;
 
-        /// <summary>
-        /// Holds all the WorkItemsGroup instaces that have at least one 
-        /// work item int the SmartThreadPool
-        /// This variable is used in case of Shutdown
-        /// </summary>
-        private Hashtable _workItemsGroups = Hashtable.Synchronized(new Hashtable());
+        #endregion
 
-        /// <summary>
-        /// A reference from each thread in the thread pool to its SmartThreadPool
-        /// object container.
-        /// With this variable a thread can know whatever it belongs to a 
-        /// SmartThreadPool.
-        /// </summary>
-        [ThreadStatic]
-        private static SmartThreadPool _smartThreadPool;
+        #region Per thread properties
 
         /// <summary>
         /// A reference to the current work item a thread from the thread pool 
         /// is executing.
         /// </summary>
-        [ThreadStatic]
-        private static WorkItem _currentWorkItem;
-
-        /// <summary>
-        /// STP performance counters
-        /// </summary>
-        private ISTPInstancePerformanceCounters _pcs = NullSTPInstancePerformanceCounters.Instance;
-
+        internal static ThreadEntry CurrentThreadEntry
+        {
+#if (WINDOWS_PHONE)
+            get
+            {
+                lock(_threadEntries)
+                {
+                    ThreadEntry threadEntry;
+                    if (_threadEntries.TryGetValue(Thread.CurrentThread.ManagedThreadId, out threadEntry))
+                    {
+                        return threadEntry;
+                    }
+                }
+                return null;
+            }
+            set
+            {
+                lock(_threadEntries)
+                {
+                    _threadEntries[Thread.CurrentThread.ManagedThreadId] = value;
+                }
+            }
+#elif (_WINDOWS_CE)
+            get
+            {
+                //Thread.CurrentThread.ManagedThreadId
+                return Thread.GetData(_threadEntrySlot) as ThreadEntry;
+            }
+            set
+            {
+                Thread.SetData(_threadEntrySlot, value);
+            }
+#else
+            get
+            {
+                return _threadEntry;
+            }
+            set
+            {
+                _threadEntry = value;
+            }
+#endif
+        }
         #endregion
 
         #region Construction and Finalization
 
         /// <summary>
-        /// Constructor
-        /// </summary>
-        public SmartThreadPool()
-        {
+                /// Constructor
+                /// </summary>
+                public SmartThreadPool()
+                {
+            _stpStartInfo = new STPStartInfo();
             Initialize();
-        }
-
-        /// <summary>
-        /// Constructor
-        /// </summary>
-        /// <param name="idleTimeout">Idle timeout in milliseconds</param>
-        public SmartThreadPool(int idleTimeout)
-        {
-            _stpStartInfo.IdleTimeout = idleTimeout;
-            Initialize();
-        }
+                }
+
+                /// <summary>
+                /// Constructor
+                /// </summary>
+                /// <param name="idleTimeout">Idle timeout in milliseconds</param>
+                public SmartThreadPool(int idleTimeout)
+                {
+            _stpStartInfo = new STPStartInfo
+            {
+                IdleTimeout = idleTimeout,
+            };
+                        Initialize();
+                }
+
+                /// <summary>
+                /// Constructor
+                /// </summary>
+                /// <param name="idleTimeout">Idle timeout in milliseconds</param>
+                /// <param name="maxWorkerThreads">Upper limit of threads in the pool</param>
+                public SmartThreadPool(
+                        int idleTimeout,
+                        int maxWorkerThreads)
+                {
+            _stpStartInfo = new STPStartInfo
+            {
+                IdleTimeout = idleTimeout,
+                MaxWorkerThreads = maxWorkerThreads,
+            };
+                        Initialize();
+                }
+
+                /// <summary>
+                /// Constructor
+                /// </summary>
+                /// <param name="idleTimeout">Idle timeout in milliseconds</param>
+                /// <param name="maxWorkerThreads">Upper limit of threads in the pool</param>
+                /// <param name="minWorkerThreads">Lower limit of threads in the pool</param>
+                public SmartThreadPool(
+                        int idleTimeout,
+                        int maxWorkerThreads,
+                        int minWorkerThreads)
+                {
+            _stpStartInfo = new STPStartInfo
+            {
+                IdleTimeout = idleTimeout,
+                MaxWorkerThreads = maxWorkerThreads,
+                MinWorkerThreads = minWorkerThreads,
+            };
+                        Initialize();
+                }
 
         /// <summary>
         /// Constructor
         /// </summary>
-        /// <param name="idleTimeout">Idle timeout in milliseconds</param>
-        /// <param name="maxWorkerThreads">Upper limit of threads in the pool</param>
-        public SmartThreadPool(
-            int idleTimeout,
-            int maxWorkerThreads)
-        {
-            _stpStartInfo.IdleTimeout = idleTimeout;
-            _stpStartInfo.MaxWorkerThreads = maxWorkerThreads;
-            Initialize();
-        }
+        /// <param name="stpStartInfo">A SmartThreadPool configuration that overrides the default behavior</param>
+                public SmartThreadPool(STPStartInfo stpStartInfo)
+                {
+                        _stpStartInfo = new STPStartInfo(stpStartInfo);
+                        Initialize();
+                }
 
-        /// <summary>
-        /// Constructor
-        /// </summary>
-        /// <param name="idleTimeout">Idle timeout in milliseconds</param>
-        /// <param name="maxWorkerThreads">Upper limit of threads in the pool</param>
-        /// <param name="minWorkerThreads">Lower limit of threads in the pool</param>
-        public SmartThreadPool(
-            int idleTimeout,
-            int maxWorkerThreads,
-            int minWorkerThreads)
-        {
-            _stpStartInfo.IdleTimeout = idleTimeout;
-            _stpStartInfo.MaxWorkerThreads = maxWorkerThreads;
-            _stpStartInfo.MinWorkerThreads = minWorkerThreads;
-            Initialize();
-        }
+                private void Initialize()
+                {
+            Name = _stpStartInfo.ThreadPoolName;
+                        ValidateSTPStartInfo();
 
-        /// <summary>
-        /// Constructor
-        /// </summary>
-        public SmartThreadPool(STPStartInfo stpStartInfo)
-        {
-            _stpStartInfo = new STPStartInfo(stpStartInfo);
-            Initialize();
-        }
+            // _stpStartInfoRW stores a read/write copy of the STPStartInfo.
+            // Actually only MaxWorkerThreads and MinWorkerThreads are overwritten
 
-        private void Initialize()
-        {
-            Name = _stpStartInfo.ThreadPoolName;
-            ValidateSTPStartInfo();
+            _isSuspended = _stpStartInfo.StartSuspended;
 
+#if (_WINDOWS_CE) || (_SILVERLIGHT) || (_MONO) || (WINDOWS_PHONE)
+                        if (null != _stpStartInfo.PerformanceCounterInstanceName)
+                        {
+                throw new NotSupportedException("Performance counters are not implemented for Compact Framework/Silverlight/Mono, instead use StpStartInfo.EnableLocalPerformanceCounters");
+            }
+#else
             if (null != _stpStartInfo.PerformanceCounterInstanceName)
             {
                 try
                 {
-                    _pcs = new STPInstancePerformanceCounters(_stpStartInfo.PerformanceCounterInstanceName);
+                    _windowsPCs = new STPInstancePerformanceCounters(_stpStartInfo.PerformanceCounterInstanceName);
                 }
-                catch(Exception e)
+                catch (Exception e)
                 {
-                    Debug.WriteLine("Unable to create Performance Counters: " + e.ToString());
-                    _pcs = NullSTPInstancePerformanceCounters.Instance;
+                    Debug.WriteLine("Unable to create Performance Counters: " + e);
+                    _windowsPCs = NullSTPInstancePerformanceCounters.Instance;
                 }
             }
+#endif
 
-            StartOptimalNumberOfThreads();
-        }
-
-        private void StartOptimalNumberOfThreads()
-        {
-            int threadsCount = Math.Max(_workItemsQueue.Count, _stpStartInfo.MinWorkerThreads);
-            threadsCount = Math.Min(threadsCount, _stpStartInfo.MaxWorkerThreads);
-            StartThreads(threadsCount);
-        }
-
-        private void ValidateSTPStartInfo()
-        {
-            if (_stpStartInfo.MinWorkerThreads < 0)
-            {
-                throw new ArgumentOutOfRangeException(
-                    "MinWorkerThreads", "MinWorkerThreads cannot be negative");
-            }
-
-            if (_stpStartInfo.MaxWorkerThreads <= 0)
+            if (_stpStartInfo.EnableLocalPerformanceCounters)
             {
-                throw new ArgumentOutOfRangeException(
-                    "MaxWorkerThreads", "MaxWorkerThreads must be greater than zero");
+                _localPCs = new LocalSTPInstancePerformanceCounters();
             }
 
-            if (_stpStartInfo.MinWorkerThreads > _stpStartInfo.MaxWorkerThreads)
+                    // If the STP is not started suspended then start the threads.
+            if (!_isSuspended)
             {
-                throw new ArgumentOutOfRangeException(
-                    "MinWorkerThreads, maxWorkerThreads", 
-                    "MaxWorkerThreads must be greater or equal to MinWorkerThreads");
+                StartOptimalNumberOfThreads();
             }
-        }
+                }
 
-        private void ValidateCallback(Delegate callback)
-        {
-            if(callback.GetInvocationList().Length > 1)
+                private void StartOptimalNumberOfThreads()
+                {
+                        int threadsCount = Math.Max(_workItemsQueue.Count, _stpStartInfo.MinWorkerThreads);
+            threadsCount = Math.Min(threadsCount, _stpStartInfo.MaxWorkerThreads);
+            threadsCount -= _workerThreads.Count;
+            if (threadsCount > 0)
             {
-                throw new NotSupportedException("SmartThreadPool doesn't support delegates chains");
+                StartThreads(threadsCount);
             }
-        }
+                }
 
-        #endregion
+                private void ValidateSTPStartInfo()
+                {
+            if (_stpStartInfo.MinWorkerThreads < 0)
+                        {
+                                throw new ArgumentOutOfRangeException(
+                                        "MinWorkerThreads", "MinWorkerThreads cannot be negative");
+                        }
 
-        #region Thread Processing
+            if (_stpStartInfo.MaxWorkerThreads <= 0)
+                        {
+                                throw new ArgumentOutOfRangeException(
+                                        "MaxWorkerThreads", "MaxWorkerThreads must be greater than zero");
+                        }
 
-        /// <summary>
-        /// Waits on the queue for a work item, shutdown, or timeout.
-        /// </summary>
-        /// <returns>
-        /// Returns the WaitingCallback or null in case of timeout or shutdown.
-        /// </returns>
-        private WorkItem Dequeue()
-        {
-            WorkItem workItem = 
+            if (_stpStartInfo.MinWorkerThreads > _stpStartInfo.MaxWorkerThreads)
+                        {
+                                throw new ArgumentOutOfRangeException(
+                                        "MinWorkerThreads, maxWorkerThreads", 
+                                        "MaxWorkerThreads must be greater or equal to MinWorkerThreads");
+                        }
+                }
+
+                private static void ValidateCallback(Delegate callback)
+                {
+                        if(callback.GetInvocationList().Length > 1)
+                        {
+                                throw new NotSupportedException("SmartThreadPool doesn't support delegates chains");
+                        }
+                }
+
+                #endregion
+
+                #region Thread Processing
+
+                /// <summary>
+                /// Waits on the queue for a work item, shutdown, or timeout.
+                /// </summary>
+                /// <returns>
+                /// Returns the WaitingCallback or null in case of timeout or shutdown.
+                /// </returns>
+                private WorkItem Dequeue()
+                {
+                        WorkItem workItem =
                 _workItemsQueue.DequeueWorkItem(_stpStartInfo.IdleTimeout, _shuttingDownEvent);
 
-            return workItem;
-        }
-
-        /// <summary>
-        /// Put a new work item in the queue
-        /// </summary>
-        /// <param name="workItem">A work item to queue</param>
-        private void Enqueue(WorkItem workItem)
-        {
-            Enqueue(workItem, true);
-        }
-
-        /// <summary>
-        /// Put a new work item in the queue
-        /// </summary>
-        /// <param name="workItem">A work item to queue</param>
-        internal void Enqueue(WorkItem workItem, bool incrementWorkItems)
-        {
-            // Make sure the workItem is not null
-            Debug.Assert(null != workItem);
-
-            if (incrementWorkItems)
-            {
-                IncrementWorkItemsCount();
-            }
-
-            _workItemsQueue.EnqueueWorkItem(workItem);
-            workItem.WorkItemIsQueued();
-
-            // If all the threads are busy then try to create a new one
-            if ((InUseThreads + WaitingCallbacks) > _workerThreads.Count) 
-            {
-                StartThreads(1);
-            }
-        }
-
-        private void IncrementWorkItemsCount()
-        {
-            _pcs.SampleWorkItems(_workItemsQueue.Count, _workItemsProcessed);
-
-            int count = Interlocked.Increment(ref _currentWorkItemsCount);
-            //Trace.WriteLine("WorkItemsCount = " + _currentWorkItemsCount.ToString());
-            if (count == 1) 
-            {
-                //Trace.WriteLine("STP is NOT idle");
+                        return workItem;
+                }
+
+                /// <summary>
+                /// Put a new work item in the queue
+                /// </summary>
+                /// <param name="workItem">A work item to queue</param>
+                internal override void Enqueue(WorkItem workItem)
+                {
+                        // Make sure the workItem is not null
+                        Debug.Assert(null != workItem);
+
+                        IncrementWorkItemsCount();
+
+            workItem.CanceledSmartThreadPool = _canceledSmartThreadPool;
+                        _workItemsQueue.EnqueueWorkItem(workItem);
+                        workItem.WorkItemIsQueued();
+
+                        // If all the threads are busy then try to create a new one
+                        if (_currentWorkItemsCount > _workerThreads.Count) 
+                        {
+                                StartThreads(1);
+                        }
+                }
+
+                private void IncrementWorkItemsCount()
+                {
+                        _windowsPCs.SampleWorkItems(_workItemsQueue.Count, _workItemsProcessed);
+            _localPCs.SampleWorkItems(_workItemsQueue.Count, _workItemsProcessed);
+
+                        int count = Interlocked.Increment(ref _currentWorkItemsCount);
+                        //Trace.WriteLine("WorkItemsCount = " + _currentWorkItemsCount.ToString());
+                        if (count == 1) 
+                        {
+                IsIdle = false;
                 _isIdleWaitHandle.Reset();
-            }
-        }
-
-        private void DecrementWorkItemsCount()
-        {
-            ++_workItemsProcessed;
-
-            // The counter counts even if the work item was cancelled
-            _pcs.SampleWorkItems(_workItemsQueue.Count, _workItemsProcessed);
+                        }
+                }
 
+                private void DecrementWorkItemsCount()
+                {
             int count = Interlocked.Decrement(ref _currentWorkItemsCount);
             //Trace.WriteLine("WorkItemsCount = " + _currentWorkItemsCount.ToString());
-            if (count == 0) 
+            if (count == 0)
             {
-                //Trace.WriteLine("STP is idle");
+                IsIdle = true;
                 _isIdleWaitHandle.Set();
             }
-        }
 
-        internal void RegisterWorkItemsGroup(IWorkItemsGroup workItemsGroup)
-        {
-            _workItemsGroups[workItemsGroup] = workItemsGroup;
-        }
-
-        internal void UnregisterWorkItemsGroup(IWorkItemsGroup workItemsGroup)
-        {
-            if (_workItemsGroups.Contains(workItemsGroup))
-            {
-                _workItemsGroups.Remove(workItemsGroup);
-            }
-        }
+            Interlocked.Increment(ref _workItemsProcessed);
 
-        /// <summary>
-        /// Inform that the current thread is about to quit or quiting.
-        /// The same thread may call this method more than once.
-        /// </summary>
-        private void InformCompleted()
-        {
-            // There is no need to lock the two methods together 
-            // since only the current thread removes itself
-            // and the _workerThreads is a synchronized hashtable
-            if (_workerThreads.Contains(Thread.CurrentThread))
+            if (!_shutdown)
             {
-                _workerThreads.Remove(Thread.CurrentThread);
-                _pcs.SampleThreads(_workerThreads.Count, _inUseWorkerThreads);
+                            // The counter counts even if the work item was cancelled
+                            _windowsPCs.SampleWorkItems(_workItemsQueue.Count, _workItemsProcessed);
+                _localPCs.SampleWorkItems(_workItemsQueue.Count, _workItemsProcessed);
             }
-        }
 
-        /// <summary>
-        /// Starts new threads
-        /// </summary>
-        /// <param name="threadsCount">The number of threads to start</param>
-        private void StartThreads(int threadsCount)
-        {
-            if (_stpStartInfo.StartSuspended)
-            {
-                return;
-            }
+                }
+
+                internal void RegisterWorkItemsGroup(IWorkItemsGroup workItemsGroup)
+                {
+                        _workItemsGroups[workItemsGroup] = workItemsGroup;
+                }
+
+                internal void UnregisterWorkItemsGroup(IWorkItemsGroup workItemsGroup)
+                {
+                        if (_workItemsGroups.Contains(workItemsGroup))
+                        {
+                                _workItemsGroups.Remove(workItemsGroup);
+                        }
+                }
+
+                /// <summary>
+                /// Inform that the current thread is about to quit or quiting.
+                /// The same thread may call this method more than once.
+                /// </summary>
+                private void InformCompleted()
+                {
+                        // There is no need to lock the two methods together 
+                        // since only the current thread removes itself
+                        // and the _workerThreads is a synchronized dictionary
+                        if (_workerThreads.Contains(Thread.CurrentThread))
+                        {
+                                _workerThreads.Remove(Thread.CurrentThread);
+                                _windowsPCs.SampleThreads(_workerThreads.Count, _inUseWorkerThreads);
+                _localPCs.SampleThreads(_workerThreads.Count, _inUseWorkerThreads);
+                        }
+                }
+
+                /// <summary>
+                /// Starts new threads
+                /// </summary>
+                /// <param name="threadsCount">The number of threads to start</param>
+                private void StartThreads(int threadsCount)
+                {
+            if (_isSuspended)
+                        {
+                                return;
+                        }
+
+                        lock(_workerThreads.SyncRoot)
+                        {
+                                // Don't start threads on shut down
+                                if (_shutdown)
+                                {
+                                        return;
+                                }
+
+                                for(int i = 0; i < threadsCount; ++i)
+                                {
+                                        // Don't create more threads then the upper limit
+                    if (_workerThreads.Count >= _stpStartInfo.MaxWorkerThreads)
+                                        {
+                                                return;
+                                        }
 
-            lock(_workerThreads.SyncRoot)
-            {
-                // Don't start threads on shut down
-                if (_shutdown)
-                {
-                    return;
-                }
+                    // Create a new thread
 
-                for(int i = 0; i < threadsCount; ++i)
-                {
-                    // Don't create more threads then the upper limit
-                    if (_workerThreads.Count >= _stpStartInfo.MaxWorkerThreads)
+#if (_SILVERLIGHT) || (WINDOWS_PHONE)
+                                        Thread workerThread = new Thread(ProcessQueuedItems);
+#else
+                    Thread workerThread =
+                        _stpStartInfo.MaxStackSize.HasValue
+                        ? new Thread(ProcessQueuedItems, _stpStartInfo.MaxStackSize.Value)
+                        : new Thread(ProcessQueuedItems);
+#endif
+                                        // Configure the new thread and start it
+                    workerThread.IsBackground = _stpStartInfo.AreThreadsBackground;
+
+#if !(_SILVERLIGHT) && !(_WINDOWS_CE) && !(WINDOWS_PHONE)
+                    if (_stpStartInfo.ApartmentState != ApartmentState.Unknown)
                     {
-                        return;
+                        workerThread.SetApartmentState(_stpStartInfo.ApartmentState);
                     }
+#endif
 
-                    // Create a new thread
-                    Thread workerThread;
-                    if (_stpStartInfo.StackSize > 0)
-                        workerThread = new Thread(ProcessQueuedItems, _stpStartInfo.StackSize);
-                    else
-                        workerThread = new Thread(ProcessQueuedItems);
-
-                    // Configure the new thread and start it
-                    workerThread.Name = "STP " + Name + " Thread #" + _threadCounter;
-                    workerThread.IsBackground = true;
+#if !(_SILVERLIGHT) && !(WINDOWS_PHONE)
                     workerThread.Priority = _stpStartInfo.ThreadPriority;
+#endif
                     workerThread.Start();
-                    ++_threadCounter;
-
-                    // Add the new thread to the hashtable and update its creation
-                    // time.
-                    _workerThreads[workerThread] = DateTime.Now;
-                    _pcs.SampleThreads(_workerThreads.Count, _inUseWorkerThreads);
-                }
-            }
-        }
-
-        /// <summary>
-        /// A worker thread method that processes work items from the work items queue.
-        /// </summary>
-        private void ProcessQueuedItems()
-        {
-            // Initialize the _smartThreadPool variable
-            _smartThreadPool = this;
-
-            try
-            {
-                bool bInUseWorkerThreadsWasIncremented = false;
-
-                // Process until shutdown.
-                while(!_shutdown)
-                {
-                    // Update the last time this thread was seen alive.
-                    // It's good for debugging.
-                    _workerThreads[Thread.CurrentThread] = DateTime.Now;
-
-                    // Wait for a work item, shutdown, or timeout
-                    WorkItem workItem = Dequeue();
-
-                    // Update the last time this thread was seen alive.
-                    // It's good for debugging.
-                    _workerThreads[Thread.CurrentThread] = DateTime.Now;
-
-                    // On timeout or shut down.
-                    if (null == workItem)
+                    workerThread.Name = string.Format("STP:{0}:{1}", Name, _threadCounter);
+                                        ++_threadCounter;
+
+                    // Add it to the dictionary and update its creation time.
+                    _workerThreads[workerThread] = new ThreadEntry(this);
+
+                                        _windowsPCs.SampleThreads(_workerThreads.Count, _inUseWorkerThreads);
+                    _localPCs.SampleThreads(_workerThreads.Count, _inUseWorkerThreads);
+                                }
+                        }
+                }
+
+                /// <summary>
+                /// A worker thread method that processes work items from the work items queue.
+                /// </summary>
+                private void ProcessQueuedItems()
+                {
+            // Keep the entry of the dictionary as thread's variable to avoid the synchronization locks
+            // of the dictionary.
+            CurrentThreadEntry = _workerThreads[Thread.CurrentThread];
+
+            FireOnThreadInitialization();
+
+                        try
+                        {
+                                bool bInUseWorkerThreadsWasIncremented = false;
+
+                                // Process until shutdown.
+                                while(!_shutdown)
+                                {
+                                        // Update the last time this thread was seen alive.
+                                        // It's good for debugging.
+                    CurrentThreadEntry.IAmAlive();
+
+                    // The following block handles the when the MaxWorkerThreads has been
+                    // incremented by the user at run-time.
+                    // Double lock for quit.
+                    if (_workerThreads.Count > _stpStartInfo.MaxWorkerThreads)
                     {
-                        // Double lock for quit.
-                        if (_workerThreads.Count > _stpStartInfo.MinWorkerThreads)
+                        lock (_workerThreads.SyncRoot)
                         {
-                            lock(_workerThreads.SyncRoot)
+                            if (_workerThreads.Count > _stpStartInfo.MaxWorkerThreads)
                             {
-                                if (_workerThreads.Count > _stpStartInfo.MinWorkerThreads)
-                                {
-                                    // Inform that the thread is quiting and then quit.
-                                    // This method must be called within this lock or else
-                                    // more threads will quit and the thread pool will go
-                                    // below the lower limit.
-                                    InformCompleted();
-                                    break;
-                                }
+                                // Inform that the thread is quiting and then quit.
+                                // This method must be called within this lock or else
+                                // more threads will quit and the thread pool will go
+                                // below the lower limit.
+                                InformCompleted();
+                                break;
                             }
                         }
                     }
 
-                    // If we didn't quit then skip to the next iteration.
-                    if (null == workItem)
-                    {
-                        continue;
-                    }
-
-                    try 
-                    {
-                        // Initialize the value to false
-                        bInUseWorkerThreadsWasIncremented = false;
-
-                        // Change the state of the work item to 'in progress' if possible.
-                        // We do it here so if the work item has been canceled we won't 
-                        // increment the _inUseWorkerThreads.
-                        // The cancel mechanism doesn't delete items from the queue,  
-                        // it marks the work item as canceled, and when the work item
-                        // is dequeued, we just skip it.
-                        // If the post execute of work item is set to always or to
-                        // call when the work item is canceled then the StartingWorkItem()
-                        // will return true, so the post execute can run.
-                        if (!workItem.StartingWorkItem())
-                        {
-                            continue;
-                        }
+                                        // Wait for a work item, shutdown, or timeout
+                                        WorkItem workItem = Dequeue();
 
-                        // Execute the callback.  Make sure to accurately
-                        // record how many callbacks are currently executing.
-                        int inUseWorkerThreads = Interlocked.Increment(ref _inUseWorkerThreads);
-                        _pcs.SampleThreads(_workerThreads.Count, inUseWorkerThreads);
+                                        // Update the last time this thread was seen alive.
+                                        // It's good for debugging.
+                    CurrentThreadEntry.IAmAlive();
 
-                        // Mark that the _inUseWorkerThreads incremented, so in the finally{}
-                        // statement we will decrement it correctly.
-                        bInUseWorkerThreadsWasIncremented = true;
-
-                        // Set the _currentWorkItem to the current work item
-                        _currentWorkItem = workItem;
-
-                        lock(workItem)
-                        {
-                            workItem.currentThread = Thread.CurrentThread;
-                        }
-
-                        ExecuteWorkItem(workItem);
-
-                        lock(workItem)
-                        {
-                            workItem.currentThread = null;
-                        }
-
-                    }
-                    catch(ThreadAbortException ex)
-                    {
-                        lock(workItem)
-                        {
-                            workItem.currentThread = null;
-                        }
-                        ex.GetHashCode();
-                        Thread.ResetAbort();
-                    }
-                    catch(Exception ex)
-                    {
+                                        // On timeout or shut down.
+                                        if (null == workItem)
+                                        {
+                                                // Double lock for quit.
+                        if (_workerThreads.Count > _stpStartInfo.MinWorkerThreads)
+                                                {
+                                                        lock(_workerThreads.SyncRoot)
+                                                        {
+                                if (_workerThreads.Count > _stpStartInfo.MinWorkerThreads)
+                                                                {
+                                                                        // Inform that the thread is quiting and then quit.
+                                                                        // This method must be called within this lock or else
+                                                                        // more threads will quit and the thread pool will go
+                                                                        // below the lower limit.
+                                                                        InformCompleted();
+                                                                        break;
+                                                                }
+                                                        }
+                                                }
+                                        }
+
+                                        // If we didn't quit then skip to the next iteration.
+                                        if (null == workItem)
+                                        {
+                                                continue;
+                                        }
+
+                                        try 
+                                        {
+                                                // Initialize the value to false
+                                                bInUseWorkerThreadsWasIncremented = false;
+
+                        // Set the Current Work Item of the thread.
+                        // Store the Current Work Item  before the workItem.StartingWorkItem() is called, 
+                        // so WorkItem.Cancel can work when the work item is between InQueue and InProgress 
+                        // states.
+                        // If the work item has been cancelled BEFORE the workItem.StartingWorkItem() 
+                        // (work item is in InQueue state) then workItem.StartingWorkItem() will return false.
+                        // If the work item has been cancelled AFTER the workItem.StartingWorkItem() then
+                        // (work item is in InProgress state) then the thread will be aborted
+                        CurrentThreadEntry.CurrentWorkItem = workItem;
+
+                                                // Change the state of the work item to 'in progress' if possible.
+                                                // We do it here so if the work item has been canceled we won't 
+                                                // increment the _inUseWorkerThreads.
+                                                // The cancel mechanism doesn't delete items from the queue,  
+                                                // it marks the work item as canceled, and when the work item
+                                                // is dequeued, we just skip it.
+                                                // If the post execute of work item is set to always or to
+                                                // call when the work item is canceled then the StartingWorkItem()
+                                                // will return true, so the post execute can run.
+                                                if (!workItem.StartingWorkItem())
+                                                {
+                                                        continue;
+                                                }
+
+                                                // Execute the callback.  Make sure to accurately
+                                                // record how many callbacks are currently executing.
+                                                int inUseWorkerThreads = Interlocked.Increment(ref _inUseWorkerThreads);
+                                                _windowsPCs.SampleThreads(_workerThreads.Count, inUseWorkerThreads);
+                        _localPCs.SampleThreads(_workerThreads.Count, inUseWorkerThreads);
+
+                                                // Mark that the _inUseWorkerThreads incremented, so in the finally{}
+                                                // statement we will decrement it correctly.
+                                                bInUseWorkerThreadsWasIncremented = true;
+
+                        workItem.FireWorkItemStarted();
+
+                                                ExecuteWorkItem(workItem);
+                                        }
+                                        catch(Exception ex)
+                                        {
                         ex.GetHashCode();
-                        // Do nothing
-                    }
-                    finally
-                    {
-                        lock(workItem)
-                        {
-                            workItem.currentThread = null;
-                        }
-
-                        if (null != workItem)
-                        {
-                            workItem.DisposeOfState();
-                        }
-
-                        // Set the _currentWorkItem to null, since we 
-                        // no longer run user's code.
-                        _currentWorkItem = null;
-
-                        // Decrement the _inUseWorkerThreads only if we had 
-                        // incremented it. Note the cancelled work items don't
-                        // increment _inUseWorkerThreads.
-                        if (bInUseWorkerThreadsWasIncremented)
-                        {
-                            int inUseWorkerThreads = Interlocked.Decrement(ref _inUseWorkerThreads);
-                            _pcs.SampleThreads(_workerThreads.Count, inUseWorkerThreads);
-                        }
-
-                        // Notify that the work item has been completed.
-                        // WorkItemsGroup may enqueue their next work item.
-                        workItem.FireWorkItemCompleted();
-
-                        // Decrement the number of work items here so the idle 
-                        // ManualResetEvent won't fluctuate.
-                        DecrementWorkItemsCount();
-                    }
-                }
-            } 
-            catch(ThreadAbortException tae)
-            {
+                                                // Do nothing
+                                        }
+                                        finally
+                                        {
+                                                workItem.DisposeOfState();
+
+                                                // Set the CurrentWorkItem to null, since we 
+                                                // no longer run user's code.
+                        CurrentThreadEntry.CurrentWorkItem = null;
+
+                                                // Decrement the _inUseWorkerThreads only if we had 
+                                                // incremented it. Note the cancelled work items don't
+                                                // increment _inUseWorkerThreads.
+                                                if (bInUseWorkerThreadsWasIncremented)
+                                                {
+                                                        int inUseWorkerThreads = Interlocked.Decrement(ref _inUseWorkerThreads);
+                                                        _windowsPCs.SampleThreads(_workerThreads.Count, inUseWorkerThreads);
+                            _localPCs.SampleThreads(_workerThreads.Count, inUseWorkerThreads);
+                                                }
+
+                                                // Notify that the work item has been completed.
+                                                // WorkItemsGroup may enqueue their next work item.
+                                                workItem.FireWorkItemCompleted();
+
+                                                // Decrement the number of work items here so the idle 
+                                                // ManualResetEvent won't fluctuate.
+                                                DecrementWorkItemsCount();
+                                        }
+                                }
+                        } 
+                        catch(ThreadAbortException tae)
+                        {
                 tae.GetHashCode();
                 // Handle the abort exception gracfully.
-                Thread.ResetAbort();
-            }
-            catch(Exception e)
-            {
-                Debug.Assert(null != e);
-            }
-            finally
-            {
-                InformCompleted();
-            }
-        }
-
-        private void ExecuteWorkItem(WorkItem workItem)
-        {
-            _pcs.SampleWorkItemsWaitTime(workItem.WaitingTime);
-            try
-            {
-                workItem.Execute();
-            }
-            catch
-            {
-                throw;
+#if !(_WINDOWS_CE) && !(_SILVERLIGHT) && !(WINDOWS_PHONE)
+                                Thread.ResetAbort();
+#endif
             }
-            finally
+                        catch(Exception e)
+                        {
+                                Debug.Assert(null != e);
+                        }
+                        finally
+                        {
+                                InformCompleted();
+                FireOnThreadTermination();
+                        }
+                }
+
+                private void ExecuteWorkItem(WorkItem workItem)
+                {
+                        _windowsPCs.SampleWorkItemsWaitTime(workItem.WaitingTime);
+            _localPCs.SampleWorkItemsWaitTime(workItem.WaitingTime);
+                        try
+                        {
+                                workItem.Execute();
+                        }
+                        finally
+                        {
+                                _windowsPCs.SampleWorkItemsProcessTime(workItem.ProcessTime);
+                _localPCs.SampleWorkItemsProcessTime(workItem.ProcessTime);
+                        }
+                }
+
+
+                #endregion
+
+                #region Public Methods
+
+                private void ValidateWaitForIdle()
+                {
+            if (null != CurrentThreadEntry && CurrentThreadEntry.AssociatedSmartThreadPool == this)
+                        {
+                                throw new NotSupportedException(
+                                        "WaitForIdle cannot be called from a thread on its SmartThreadPool, it causes a deadlock");
+                        }
+                }
+
+                internal static void ValidateWorkItemsGroupWaitForIdle(IWorkItemsGroup workItemsGroup)
+                {
+            if (null == CurrentThreadEntry)
             {
-                _pcs.SampleWorkItemsProcessTime(workItem.ProcessTime);
+                return;
             }
-        }
-
-
-        #endregion
 
-        #region Public Methods
-
-        /// <summary>
-        /// Queue a work item
+            WorkItem workItem = CurrentThreadEntry.CurrentWorkItem;
+            ValidateWorkItemsGroupWaitForIdleImpl(workItemsGroup, workItem);
+                        if ((null != workItemsGroup) &&
+                (null != workItem) &&
+                CurrentThreadEntry.CurrentWorkItem.WasQueuedBy(workItemsGroup))
+                        {
+                                throw new NotSupportedException("WaitForIdle cannot be called from a thread on its SmartThreadPool, it causes a deadlock");
+                        }
+                }
+
+                [MethodImpl(MethodImplOptions.NoInlining)]
+                private static void ValidateWorkItemsGroupWaitForIdleImpl(IWorkItemsGroup workItemsGroup, WorkItem workItem)
+                {
+                        if ((null != workItemsGroup) && 
+                                (null != workItem) &&
+                                workItem.WasQueuedBy(workItemsGroup))
+                        {
+                                throw new NotSupportedException("WaitForIdle cannot be called from a thread on its SmartThreadPool, it causes a deadlock");
+                        }
+                }
+
+                /// <summary>
+                /// Force the SmartThreadPool to shutdown
+                /// </summary>
+                public void Shutdown()
+                {
+                        Shutdown(true, 0);
+                }
+
+        /// <summary>
+        /// Force the SmartThreadPool to shutdown with timeout
         /// </summary>
-        /// <param name="callback">A callback to execute</param>
-        /// <returns>Returns a work item result</returns>
-        public IWorkItemResult QueueWorkItem(WorkItemCallback callback)
-        {
-            ValidateNotDisposed();
-            ValidateCallback(callback);
-            WorkItem workItem = WorkItemFactory.CreateWorkItem(this, _stpStartInfo, callback);
-            Enqueue(workItem);
-            return workItem.GetWorkItemResult();
-        }
+        public void Shutdown(bool forceAbort, TimeSpan timeout)
+                {
+                        Shutdown(forceAbort, (int)timeout.TotalMilliseconds);
+                }
+
+                /// <summary>
+                /// Empties the queue of work items and abort the threads in the pool.
+                /// </summary>
+                public void Shutdown(bool forceAbort, int millisecondsTimeout)
+                {
+                        ValidateNotDisposed();
+
+                        ISTPInstancePerformanceCounters pcs = _windowsPCs;
+
+                        if (NullSTPInstancePerformanceCounters.Instance != _windowsPCs)
+                        {
+                                // Set the _pcs to "null" to stop updating the performance
+                                // counters
+                                _windowsPCs = NullSTPInstancePerformanceCounters.Instance;
+
+                pcs.Dispose();
+                        }
+
+                        Thread [] threads;
+                        lock(_workerThreads.SyncRoot)
+                        {
+                                // Shutdown the work items queue
+                                _workItemsQueue.Dispose();
+
+                                // Signal the threads to exit
+                                _shutdown = true;
+                                _shuttingDownEvent.Set();
+
+                                // Make a copy of the threads' references in the pool
+                                threads = new Thread [_workerThreads.Count];
+                                _workerThreads.Keys.CopyTo(threads, 0);
+                        }
+
+                        int millisecondsLeft = millisecondsTimeout;
+            Stopwatch stopwatch = Stopwatch.StartNew();
+            //DateTime start = DateTime.UtcNow;
+                        bool waitInfinitely = (Timeout.Infinite == millisecondsTimeout);
+                        bool timeout = false;
+
+                        // Each iteration we update the time left for the timeout.
+                        foreach(Thread thread in threads)
+                        {
+                                // Join don't work with negative numbers
+                                if (!waitInfinitely && (millisecondsLeft < 0))
+                                {
+                                        timeout = true;
+                                        break;
+                                }
+
+                                // Wait for the thread to terminate
+                                bool success = thread.Join(millisecondsLeft);
+                                if(!success)
+                                {
+                                        timeout = true;
+                                        break;
+                                }
+
+                                if(!waitInfinitely)
+                                {
+                                        // Update the time left to wait
+                    //TimeSpan ts = DateTime.UtcNow - start;
+                    millisecondsLeft = millisecondsTimeout - (int)stopwatch.ElapsedMilliseconds;
+                                }
+                        }
+
+                        if (timeout && forceAbort)
+                        {
+                                // Abort the threads in the pool
+                                foreach(Thread thread in threads)
+                                {
+                    
+                                        if ((thread != null)
+#if !(_WINDOWS_CE)
+                        && thread.IsAlive
+#endif                        
+                        )
+                                        {
+                                                try 
+                                                {
+                            thread.Abort(); // Shutdown
+                                                }
+                                                catch(SecurityException e)
+                                                {
+                            e.GetHashCode();
+                                                }
+                                                catch(ThreadStateException ex)
+                                                {
+                            ex.GetHashCode();
+                                                        // In case the thread has been terminated 
+                                                        // after the check if it is alive.
+                                                }
+                                        }
+                                }
+                        }
+                }
+
+                /// <summary>
+                /// Wait for all work items to complete
+                /// </summary>
+        /// <param name="waitableResults">Array of work item result objects</param>
+                /// <returns>
+                /// true when every work item in workItemResults has completed; otherwise false.
+                /// </returns>
+                public static bool WaitAll(
+                        IWaitableResult [] waitableResults)
+                {
+            return WaitAll(waitableResults, Timeout.Infinite, true);
+                }
+
+                /// <summary>
+                /// Wait for all work items to complete
+                /// </summary>
+        /// <param name="waitableResults">Array of work item result objects</param>
+                /// <param name="timeout">The number of milliseconds to wait, or a TimeSpan that represents -1 milliseconds to wait indefinitely. </param>
+                /// <param name="exitContext">
+                /// true to exit the synchronization domain for the context before the wait (if in a synchronized context), and reacquire it; otherwise, false. 
+                /// </param>
+                /// <returns>
+                /// true when every work item in workItemResults has completed; otherwise false.
+                /// </returns>
+                public static bool WaitAll(
+                        IWaitableResult [] waitableResults,
+                        TimeSpan timeout,
+                        bool exitContext)
+                {
+            return WaitAll(waitableResults, (int)timeout.TotalMilliseconds, exitContext);
+                }
+
+                /// <summary>
+                /// Wait for all work items to complete
+                /// </summary>
+        /// <param name="waitableResults">Array of work item result objects</param>
+                /// <param name="timeout">The number of milliseconds to wait, or a TimeSpan that represents -1 milliseconds to wait indefinitely. </param>
+                /// <param name="exitContext">
+                /// true to exit the synchronization domain for the context before the wait (if in a synchronized context), and reacquire it; otherwise, false. 
+                /// </param>
+                /// <param name="cancelWaitHandle">A cancel wait handle to interrupt the wait if needed</param>
+                /// <returns>
+                /// true when every work item in workItemResults has completed; otherwise false.
+                /// </returns>
+                public static bool WaitAll(
+            IWaitableResult[] waitableResults,  
+                        TimeSpan timeout,
+                        bool exitContext,
+                        WaitHandle cancelWaitHandle)
+                {
+            return WaitAll(waitableResults, (int)timeout.TotalMilliseconds, exitContext, cancelWaitHandle);
+                }
+
+                /// <summary>
+                /// Wait for all work items to complete
+                /// </summary>
+        /// <param name="waitableResults">Array of work item result objects</param>
+                /// <param name="millisecondsTimeout">The number of milliseconds to wait, or Timeout.Infinite (-1) to wait indefinitely.</param>
+                /// <param name="exitContext">
+                /// true to exit the synchronization domain for the context before the wait (if in a synchronized context), and reacquire it; otherwise, false. 
+                /// </param>
+                /// <returns>
+                /// true when every work item in workItemResults has completed; otherwise false.
+                /// </returns>
+                public static bool WaitAll(
+                        IWaitableResult [] waitableResults,  
+                        int millisecondsTimeout,
+                        bool exitContext)
+                {
+            return WorkItem.WaitAll(waitableResults, millisecondsTimeout, exitContext, null);
+                }
+
+                /// <summary>
+                /// Wait for all work items to complete
+                /// </summary>
+        /// <param name="waitableResults">Array of work item result objects</param>
+                /// <param name="millisecondsTimeout">The number of milliseconds to wait, or Timeout.Infinite (-1) to wait indefinitely.</param>
+                /// <param name="exitContext">
+                /// true to exit the synchronization domain for the context before the wait (if in a synchronized context), and reacquire it; otherwise, false. 
+                /// </param>
+                /// <param name="cancelWaitHandle">A cancel wait handle to interrupt the wait if needed</param>
+                /// <returns>
+                /// true when every work item in workItemResults has completed; otherwise false.
+                /// </returns>
+                public static bool WaitAll(
+            IWaitableResult[] waitableResults,  
+                        int millisecondsTimeout,
+                        bool exitContext,
+                        WaitHandle cancelWaitHandle)
+                {
+            return WorkItem.WaitAll(waitableResults, millisecondsTimeout, exitContext, cancelWaitHandle);
+                }
+
+
+                /// <summary>
+                /// Waits for any of the work items in the specified array to complete, cancel, or timeout
+                /// </summary>
+        /// <param name="waitableResults">Array of work item result objects</param>
+                /// <returns>
+                /// The array index of the work item result that satisfied the wait, or WaitTimeout if any of the work items has been canceled.
+                /// </returns>
+                public static int WaitAny(
+                        IWaitableResult [] waitableResults)
+                {
+            return WaitAny(waitableResults, Timeout.Infinite, true);
+                }
+
+                /// <summary>
+                /// Waits for any of the work items in the specified array to complete, cancel, or timeout
+                /// </summary>
+        /// <param name="waitableResults">Array of work item result objects</param>
+                /// <param name="timeout">The number of milliseconds to wait, or a TimeSpan that represents -1 milliseconds to wait indefinitely. </param>
+                /// <param name="exitContext">
+                /// true to exit the synchronization domain for the context before the wait (if in a synchronized context), and reacquire it; otherwise, false. 
+                /// </param>
+                /// <returns>
+                /// The array index of the work item result that satisfied the wait, or WaitTimeout if no work item result satisfied the wait and a time interval equivalent to millisecondsTimeout has passed or the work item has been canceled.
+                /// </returns>
+                public static int WaitAny(
+            IWaitableResult[] waitableResults,
+                        TimeSpan timeout,
+                        bool exitContext)
+                {
+            return WaitAny(waitableResults, (int)timeout.TotalMilliseconds, exitContext);
+                }
+
+                /// <summary>
+                /// Waits for any of the work items in the specified array to complete, cancel, or timeout
+                /// </summary>
+        /// <param name="waitableResults">Array of work item result objects</param>
+                /// <param name="timeout">The number of milliseconds to wait, or a TimeSpan that represents -1 milliseconds to wait indefinitely. </param>
+                /// <param name="exitContext">
+                /// true to exit the synchronization domain for the context before the wait (if in a synchronized context), and reacquire it; otherwise, false. 
+                /// </param>
+                /// <param name="cancelWaitHandle">A cancel wait handle to interrupt the wait if needed</param>
+                /// <returns>
+                /// The array index of the work item result that satisfied the wait, or WaitTimeout if no work item result satisfied the wait and a time interval equivalent to millisecondsTimeout has passed or the work item has been canceled.
+                /// </returns>
+                public static int WaitAny(
+                        IWaitableResult [] waitableResults,
+                        TimeSpan timeout,
+                        bool exitContext,
+                        WaitHandle cancelWaitHandle)
+                {
+            return WaitAny(waitableResults, (int)timeout.TotalMilliseconds, exitContext, cancelWaitHandle);
+                }
+
+                /// <summary>
+                /// Waits for any of the work items in the specified array to complete, cancel, or timeout
+                /// </summary>
+        /// <param name="waitableResults">Array of work item result objects</param>
+                /// <param name="millisecondsTimeout">The number of milliseconds to wait, or Timeout.Infinite (-1) to wait indefinitely.</param>
+                /// <param name="exitContext">
+                /// true to exit the synchronization domain for the context before the wait (if in a synchronized context), and reacquire it; otherwise, false. 
+                /// </param>
+                /// <returns>
+                /// The array index of the work item result that satisfied the wait, or WaitTimeout if no work item result satisfied the wait and a time interval equivalent to millisecondsTimeout has passed or the work item has been canceled.
+                /// </returns>
+                public static int WaitAny(
+                        IWaitableResult [] waitableResults,  
+                        int millisecondsTimeout,
+                        bool exitContext)
+                {
+            return WorkItem.WaitAny(waitableResults, millisecondsTimeout, exitContext, null);
+                }
+
+                /// <summary>
+                /// Waits for any of the work items in the specified array to complete, cancel, or timeout
+                /// </summary>
+        /// <param name="waitableResults">Array of work item result objects</param>
+                /// <param name="millisecondsTimeout">The number of milliseconds to wait, or Timeout.Infinite (-1) to wait indefinitely.</param>
+                /// <param name="exitContext">
+                /// true to exit the synchronization domain for the context before the wait (if in a synchronized context), and reacquire it; otherwise, false. 
+                /// </param>
+                /// <param name="cancelWaitHandle">A cancel wait handle to interrupt the wait if needed</param>
+                /// <returns>
+                /// The array index of the work item result that satisfied the wait, or WaitTimeout if no work item result satisfied the wait and a time interval equivalent to millisecondsTimeout has passed or the work item has been canceled.
+                /// </returns>
+                public static int WaitAny(
+                        IWaitableResult [] waitableResults,  
+                        int millisecondsTimeout,
+                        bool exitContext,
+                        WaitHandle cancelWaitHandle)
+                {
+            return WorkItem.WaitAny(waitableResults, millisecondsTimeout, exitContext, cancelWaitHandle);
+                }
+
+        /// <summary>
+        /// Creates a new WorkItemsGroup.
+        /// </summary>
+        /// <param name="concurrency">The number of work items that can be run concurrently</param>
+        /// <returns>A reference to the WorkItemsGroup</returns>
+                public IWorkItemsGroup CreateWorkItemsGroup(int concurrency)
+                {
+            IWorkItemsGroup workItemsGroup = new WorkItemsGroup(this, concurrency, _stpStartInfo);
+                        return workItemsGroup;
+                }
 
         /// <summary>
-        /// Queue a work item
+        /// Creates a new WorkItemsGroup.
         /// </summary>
-        /// <param name="callback">A callback to execute</param>
-        /// <param name="workItemPriority">The priority of the work item</param>
-        /// <returns>Returns a work item result</returns>
-        public IWorkItemResult QueueWorkItem(WorkItemCallback callback, WorkItemPriority workItemPriority)
-        {
-            ValidateNotDisposed();
-            ValidateCallback(callback);
-            WorkItem workItem = WorkItemFactory.CreateWorkItem(this, _stpStartInfo, callback, workItemPriority);
-            Enqueue(workItem);
-            return workItem.GetWorkItemResult();
-        }
+        /// <param name="concurrency">The number of work items that can be run concurrently</param>
+        /// <param name="wigStartInfo">A WorkItemsGroup configuration that overrides the default behavior</param>
+        /// <returns>A reference to the WorkItemsGroup</returns>
+                public IWorkItemsGroup CreateWorkItemsGroup(int concurrency, WIGStartInfo wigStartInfo)
+                {
+                        IWorkItemsGroup workItemsGroup = new WorkItemsGroup(this, concurrency, wigStartInfo);
+                        return workItemsGroup;
+                }
 
-        /// <summary>
-        /// Queue a work item
-        /// </summary>
-        /// <param name="workItemInfo">Work item info</param>
-        /// <param name="callback">A callback to execute</param>
-        /// <returns>Returns a work item result</returns>
-        public IWorkItemResult QueueWorkItem(WorkItemInfo workItemInfo, WorkItemCallback callback)
-        {
-            ValidateNotDisposed();
-            ValidateCallback(callback);
-            WorkItem workItem = WorkItemFactory.CreateWorkItem(this, _stpStartInfo, workItemInfo, callback);
-            Enqueue(workItem);
-            return workItem.GetWorkItemResult();
-        }
+        #region Fire Thread's Events
 
-        /// <summary>
-        /// Queue a work item
-        /// </summary>
-        /// <param name="callback">A callback to execute</param>
-        /// <param name="state">
-        /// The context object of the work item. Used for passing arguments to the work item. 
-        /// </param>
-        /// <returns>Returns a work item result</returns>
-        public IWorkItemResult QueueWorkItem(WorkItemCallback callback, object state)
+        private void FireOnThreadInitialization()
         {
-            ValidateNotDisposed();
-            ValidateCallback(callback);
-            WorkItem workItem = WorkItemFactory.CreateWorkItem(this, _stpStartInfo, callback, state);
-            Enqueue(workItem);
-            return workItem.GetWorkItemResult();
+            if (null != _onThreadInitialization)
+            {
+                foreach (ThreadInitializationHandler tih in _onThreadInitialization.GetInvocationList())
+                {
+                    try
+                    {
+                        tih();
+                    }
+                    catch (Exception e)
+                    {
+                        e.GetHashCode();
+                        Debug.Assert(false);
+                        throw;
+                    }
+                }
+            }
         }
 
-        /// <summary>
-        /// Queue a work item
-        /// </summary>
-        /// <param name="callback">A callback to execute</param>
-        /// <param name="state">
-        /// The context object of the work item. Used for passing arguments to the work item. 
-        /// </param>
-        /// <param name="workItemPriority">The work item priority</param>
-        /// <returns>Returns a work item result</returns>
-        public IWorkItemResult QueueWorkItem(WorkItemCallback callback, object state, WorkItemPriority workItemPriority)
+        private void FireOnThreadTermination()
         {
-            ValidateNotDisposed();
-            ValidateCallback(callback);
-            WorkItem workItem = WorkItemFactory.CreateWorkItem(this, _stpStartInfo, callback, state, workItemPriority);
-            Enqueue(workItem);
-            return workItem.GetWorkItemResult();
+            if (null != _onThreadTermination)
+            {
+                foreach (ThreadTerminationHandler tth in _onThreadTermination.GetInvocationList())
+                {
+                    try
+                    {
+                        tth();
+                    }
+                    catch (Exception e)
+                    {
+                        e.GetHashCode();
+                        Debug.Assert(false);
+                        throw;
+                    }
+                }
+            }
         }
 
-        /// <summary>
-        /// Queue a work item
-        /// </summary>
-        /// <param name="workItemInfo">Work item information</param>
-        /// <param name="callback">A callback to execute</param>
-        /// <param name="state">
-        /// The context object of the work item. Used for passing arguments to the work item. 
-        /// </param>
-        /// <returns>Returns a work item result</returns>
-        public IWorkItemResult QueueWorkItem(WorkItemInfo workItemInfo, WorkItemCallback callback, object state)
-        {
-            ValidateNotDisposed();
-            ValidateCallback(callback);
-            WorkItem workItem = WorkItemFactory.CreateWorkItem(this, _stpStartInfo, workItemInfo, callback, state);
-            Enqueue(workItem);
-            return workItem.GetWorkItemResult();
-        }
+        #endregion
 
         /// <summary>
-        /// Queue a work item
+        /// This event is fired when a thread is created.
+        /// Use it to initialize a thread before the work items use it.
         /// </summary>
-        /// <param name="callback">A callback to execute</param>
-        /// <param name="state">
-        /// The context object of the work item. Used for passing arguments to the work item. 
-        /// </param>
-        /// <param name="postExecuteWorkItemCallback">
-        /// A delegate to call after the callback completion
-        /// </param>
-        /// <returns>Returns a work item result</returns>
-        public IWorkItemResult QueueWorkItem(
-            WorkItemCallback callback, 
-            object state,
-            PostExecuteWorkItemCallback postExecuteWorkItemCallback)
+        public event ThreadInitializationHandler OnThreadInitialization
         {
-            ValidateNotDisposed();
-            ValidateCallback(callback);
-            WorkItem workItem = WorkItemFactory.CreateWorkItem(this, _stpStartInfo, callback, state, postExecuteWorkItemCallback);
-            Enqueue(workItem);
-            return workItem.GetWorkItemResult();
+            add { _onThreadInitialization += value; }
+            remove { _onThreadInitialization -= value; }
         }
 
         /// <summary>
-        /// Queue a work item
+        /// This event is fired when a thread is terminating.
+        /// Use it for cleanup.
         /// </summary>
-        /// <param name="callback">A callback to execute</param>
-        /// <param name="state">
-        /// The context object of the work item. Used for passing arguments to the work item. 
-        /// </param>
-        /// <param name="postExecuteWorkItemCallback">
-        /// A delegate to call after the callback completion
-        /// </param>
-        /// <param name="workItemPriority">The work item priority</param>
-        /// <returns>Returns a work item result</returns>
-        public IWorkItemResult QueueWorkItem(
-            WorkItemCallback callback, 
-            object state,
-            PostExecuteWorkItemCallback postExecuteWorkItemCallback,
-            WorkItemPriority workItemPriority)
+        public event ThreadTerminationHandler OnThreadTermination
         {
-            ValidateNotDisposed();
-            ValidateCallback(callback);
-            WorkItem workItem = WorkItemFactory.CreateWorkItem(this, _stpStartInfo, callback, state, postExecuteWorkItemCallback, workItemPriority);
-            Enqueue(workItem);
-            return workItem.GetWorkItemResult();
+            add { _onThreadTermination += value; }
+            remove { _onThreadTermination -= value; }
         }
 
-        /// <summary>
-        /// Queue a work item
-        /// </summary>
-        /// <param name="callback">A callback to execute</param>
-        /// <param name="state">
-        /// The context object of the work item. Used for passing arguments to the work item. 
-        /// </param>
-        /// <param name="postExecuteWorkItemCallback">
-        /// A delegate to call after the callback completion
-        /// </param>
-        /// <param name="callToPostExecute">Indicates on which cases to call to the post execute callback</param>
-        /// <returns>Returns a work item result</returns>
-        public IWorkItemResult QueueWorkItem(
-            WorkItemCallback callback, 
-            object state,
-            PostExecuteWorkItemCallback postExecuteWorkItemCallback,
-            CallToPostExecute callToPostExecute)
-        {
-            ValidateNotDisposed();
-            ValidateCallback(callback);
-            WorkItem workItem = WorkItemFactory.CreateWorkItem(this, _stpStartInfo, callback, state, postExecuteWorkItemCallback, callToPostExecute);
-            Enqueue(workItem);
-            return workItem.GetWorkItemResult();
-        }
 
-        /// <summary>
-        /// Queue a work item
-        /// </summary>
-        /// <param name="callback">A callback to execute</param>
-        /// <param name="state">
-        /// The context object of the work item. Used for passing arguments to the work item. 
-        /// </param>
-        /// <param name="postExecuteWorkItemCallback">
-        /// A delegate to call after the callback completion
-        /// </param>
-        /// <param name="callToPostExecute">Indicates on which cases to call to the post execute callback</param>
-        /// <param name="workItemPriority">The work item priority</param>
-        /// <returns>Returns a work item result</returns>
-        public IWorkItemResult QueueWorkItem(
-            WorkItemCallback callback, 
-            object state,
-            PostExecuteWorkItemCallback postExecuteWorkItemCallback,
-            CallToPostExecute callToPostExecute,
-            WorkItemPriority workItemPriority)
+        internal void CancelAbortWorkItemsGroup(WorkItemsGroup wig)
         {
-            ValidateNotDisposed();
-            ValidateCallback(callback);
-            WorkItem workItem = WorkItemFactory.CreateWorkItem(this, _stpStartInfo, callback, state, postExecuteWorkItemCallback, callToPostExecute, workItemPriority);
-            Enqueue(workItem);
-            return workItem.GetWorkItemResult();
+            foreach (ThreadEntry threadEntry in _workerThreads.Values)
+            {
+                WorkItem workItem = threadEntry.CurrentWorkItem;
+                if (null != workItem &&
+                    workItem.WasQueuedBy(wig) &&
+                    !workItem.IsCanceled)
+                {
+                    threadEntry.CurrentWorkItem.GetWorkItemResult().Cancel(true);
+                }
+            }
         }
 
-        /// <summary>
-        /// Wait for the thread pool to be idle
-        /// </summary>
-        public void WaitForIdle()
-        {
-            WaitForIdle(Timeout.Infinite);
-        }
+        
 
-        /// <summary>
-        /// Wait for the thread pool to be idle
-        /// </summary>
-        public bool WaitForIdle(TimeSpan timeout)
-        {
-            return WaitForIdle((int)timeout.TotalMilliseconds);
-        }
+                #endregion
 
-        /// <summary>
-        /// Wait for the thread pool to be idle
-        /// </summary>
-        public bool WaitForIdle(int millisecondsTimeout)
-        {
-            ValidateWaitForIdle();
-            return _isIdleWaitHandle.WaitOne(millisecondsTimeout, false);
-        }
+                #region Properties
 
-        private void ValidateWaitForIdle()
-        {
-            if(_smartThreadPool == this)
+                /// <summary>
+                /// Get/Set the lower limit of threads in the pool.
+                /// </summary>
+                public int MinThreads 
+                { 
+                        get 
+                        {
+                                ValidateNotDisposed();
+                return _stpStartInfo.MinWorkerThreads; 
+                        }
+            set
             {
-                throw new NotSupportedException(
-                    "WaitForIdle cannot be called from a thread on its SmartThreadPool, it will cause may cause a deadlock");
+                Debug.Assert(value >= 0);
+                Debug.Assert(value <= _stpStartInfo.MaxWorkerThreads);
+                if (_stpStartInfo.MaxWorkerThreads < value)
+                {
+                    _stpStartInfo.MaxWorkerThreads = value;
+                }
+                _stpStartInfo.MinWorkerThreads = value;
+                StartOptimalNumberOfThreads();
             }
-        }
+                }
+
+            /// <summary>
+                /// Get/Set the upper limit of threads in the pool.
+                /// </summary>
+                public int MaxThreads 
+                { 
+                        get 
+                        {
+                                ValidateNotDisposed();
+                return _stpStartInfo.MaxWorkerThreads; 
+                        } 
 
-        internal void ValidateWorkItemsGroupWaitForIdle(IWorkItemsGroup workItemsGroup)
+                        set 
+                        {
+                Debug.Assert(value > 0);
+                Debug.Assert(value >= _stpStartInfo.MinWorkerThreads);
+                if (_stpStartInfo.MinWorkerThreads > value)
+                {
+                    _stpStartInfo.MinWorkerThreads = value;
+                }
+                _stpStartInfo.MaxWorkerThreads = value;
+                StartOptimalNumberOfThreads();
+            } 
+                }
+                /// <summary>
+                /// Get the number of threads in the thread pool.
+                /// Should be between the lower and the upper limits.
+                /// </summary>
+                public int ActiveThreads 
+                { 
+                        get 
+                        {
+                                ValidateNotDisposed();
+                                return _workerThreads.Count; 
+                        } 
+                }
+
+                /// <summary>
+                /// Get the number of busy (not idle) threads in the thread pool.
+                /// </summary>
+                public int InUseThreads 
+                { 
+                        get 
+                        { 
+                                ValidateNotDisposed();
+                                return _inUseWorkerThreads; 
+                        } 
+                }
+
+        /// <summary>
+        /// Returns true if the current running work item has been cancelled.
+        /// Must be used within the work item's callback method.
+        /// The work item should sample this value in order to know if it
+        /// needs to quit before its completion.
+        /// </summary>
+        public static bool IsWorkItemCanceled
         {
-            ValidateWorkItemsGroupWaitForIdleImpl(workItemsGroup, SmartThreadPool._currentWorkItem);
-            if ((null != workItemsGroup) && 
-                (null != SmartThreadPool._currentWorkItem) &&
-                SmartThreadPool._currentWorkItem.WasQueuedBy(workItemsGroup))
+            get
             {
-                throw new NotSupportedException("WaitForIdle cannot be called from a thread on its SmartThreadPool, it will cause may cause a deadlock");
+                return CurrentThreadEntry.CurrentWorkItem.IsCanceled;
             }
-        }
-
-        [MethodImpl(MethodImplOptions.NoInlining)]
-        private void ValidateWorkItemsGroupWaitForIdleImpl(IWorkItemsGroup workItemsGroup, WorkItem workItem)
+        } 
+        
+        /// <summary>
+        /// Checks if the work item has been cancelled, and if yes then abort the thread.
+        /// Can be used with Cancel and timeout
+        /// </summary>
+        public static void AbortOnWorkItemCancel()
         {
-            if ((null != workItemsGroup) && 
-                (null != workItem) &&
-                workItem.WasQueuedBy(workItemsGroup))
+            if (IsWorkItemCanceled)
             {
-                throw new NotSupportedException("WaitForIdle cannot be called from a thread on its SmartThreadPool, it will cause may cause a deadlock");
+                Thread.CurrentThread.Abort();
             }
         }
 
-
-
         /// <summary>
-        /// Force the SmartThreadPool to shutdown
+        /// Thread Pool start information (readonly)
         /// </summary>
-        public void Shutdown()
+        public STPStartInfo STPStartInfo
         {
-            Shutdown(true, 0);
+            get 
+            {
+                return _stpStartInfo.AsReadOnly(); 
+            }
         }
 
-        public void Shutdown(bool forceAbort, TimeSpan timeout)
-        {
-            Shutdown(forceAbort, (int)timeout.TotalMilliseconds);
-        }
+            public bool IsShuttingdown
+            {
+            get { return _shutdown;  }
+            }
 
         /// <summary>
-        /// Empties the queue of work items and abort the threads in the pool.
+        /// Return the local calculated performance counters
+        /// Available only if STPStartInfo.EnableLocalPerformanceCounters is true.
         /// </summary>
-        public void Shutdown(bool forceAbort, int millisecondsTimeout)
+        public ISTPPerformanceCountersReader PerformanceCountersReader
         {
-            ValidateNotDisposed();
-
-            ISTPInstancePerformanceCounters pcs = _pcs;
-
-            if (NullSTPInstancePerformanceCounters.Instance != _pcs)
-            {
-                _pcs.Dispose();
-                // Set the _pcs to "null" to stop updating the performance
-                // counters
-                _pcs = NullSTPInstancePerformanceCounters.Instance;
-            }
-
-            Thread [] threads = null;
-            lock(_workerThreads.SyncRoot)
-            {
-                // Shutdown the work items queue
-                _workItemsQueue.Dispose();
-
-                // Signal the threads to exit
-                _shutdown = true;
-                _shuttingDownEvent.Set();
+            get { return (ISTPPerformanceCountersReader)_localPCs; }
+        }
 
-                // Make a copy of the threads' references in the pool
-                threads = new Thread [_workerThreads.Count];
-                _workerThreads.Keys.CopyTo(threads, 0);
-            }
+        #endregion
 
-            int millisecondsLeft = millisecondsTimeout;
-            DateTime start = DateTime.Now;
-            bool waitInfinitely = (Timeout.Infinite == millisecondsTimeout);
-            bool timeout = false;
+        #region IDisposable Members
 
-            // Each iteration we update the time left for the timeout.
-            foreach(Thread thread in threads)
+        public void Dispose()
+        {
+            if (!_isDisposed)
             {
-                // Join don't work with negative numbers
-                if (!waitInfinitely && (millisecondsLeft < 0))
+                if (!_shutdown)
                 {
-                    timeout = true;
-                    break;
+                    Shutdown();
                 }
 
-                // Wait for the thread to terminate
-                bool success = thread.Join(millisecondsLeft);
-                if(!success)
+                if (null != _shuttingDownEvent)
                 {
-                    timeout = true;
-                    break;
+                    _shuttingDownEvent.Close();
+                    _shuttingDownEvent = null;
                 }
-
-                if(!waitInfinitely)
+                _workerThreads.Clear();
+                
+                if (null != _isIdleWaitHandle)
                 {
-                    // Update the time left to wait
-                    TimeSpan ts = DateTime.Now - start;
-                    millisecondsLeft = millisecondsTimeout - (int)ts.TotalMilliseconds;
+                    _isIdleWaitHandle.Close();
+                    _isIdleWaitHandle = null;
                 }
-            }
 
-            if (timeout && forceAbort)
-            {
-                // Abort the threads in the pool
-                foreach(Thread thread in threads)
-                {
-                    if ((thread != null) && thread.IsAlive) 
-                    {
-                        try 
-                        {
-                            thread.Abort("Shutdown");
-                        }
-                        catch(SecurityException e)
-                        {
-                            e.GetHashCode();
-                        }
-                        catch(ThreadStateException ex)
-                        {
-                            ex.GetHashCode();
-                            // In case the thread has been terminated 
-                            // after the check if it is alive.
-                        }
-                    }
-                }
+                _isDisposed = true;
             }
-
-            // Dispose of the performance counters
-            pcs.Dispose();
         }
 
-        /// <summary>
-        /// Wait for all work items to complete
-        /// </summary>
-        /// <param name="workItemResults">Array of work item result objects</param>
-        /// <returns>
-        /// true when every work item in workItemResults has completed; otherwise false.
-        /// </returns>
-        public static bool WaitAll(
-            IWorkItemResult [] workItemResults)
+        private void ValidateNotDisposed()
         {
-            return WaitAll(workItemResults, Timeout.Infinite, true);
+            if(_isDisposed)
+            {
+                throw new ObjectDisposedException(GetType().ToString(), "The SmartThreadPool has been shutdown");
+            }
         }
+        #endregion
+
+        #region WorkItemsGroupBase Overrides
 
         /// <summary>
-        /// Wait for all work items to complete
+        /// Get/Set the maximum number of work items that execute cocurrency on the thread pool
         /// </summary>
-        /// <param name="workItemResults">Array of work item result objects</param>
-        /// <param name="timeout">The number of milliseconds to wait, or a TimeSpan that represents -1 milliseconds to wait indefinitely. </param>
-        /// <param name="exitContext">
-        /// true to exit the synchronization domain for the context before the wait (if in a synchronized context), and reacquire it; otherwise, false. 
-        /// </param>
-        /// <returns>
-        /// true when every work item in workItemResults has completed; otherwise false.
-        /// </returns>
-        public static bool WaitAll(
-            IWorkItemResult [] workItemResults,
-            TimeSpan timeout,
-            bool exitContext)
-        {
-            return WaitAll(workItemResults, (int)timeout.TotalMilliseconds, exitContext);
-        }
+        public override int Concurrency
+            {
+                get { return MaxThreads; }
+                set { MaxThreads = value; }
+            }
+
+            /// <summary>
+            /// Get the number of work items in the queue.
+            /// </summary>
+            public override int WaitingCallbacks
+            {
+                get
+                {
+                    ValidateNotDisposed();
+                    return _workItemsQueue.Count;
+                }
+            }
 
         /// <summary>
-        /// Wait for all work items to complete
+        /// Get an array with all the state objects of the currently running items.
+        /// The array represents a snap shot and impact performance.
         /// </summary>
-        /// <param name="workItemResults">Array of work item result objects</param>
-        /// <param name="timeout">The number of milliseconds to wait, or a TimeSpan that represents -1 milliseconds to wait indefinitely. </param>
-        /// <param name="exitContext">
-        /// true to exit the synchronization domain for the context before the wait (if in a synchronized context), and reacquire it; otherwise, false. 
-        /// </param>
-        /// <param name="cancelWaitHandle">A cancel wait handle to interrupt the wait if needed</param>
-        /// <returns>
-        /// true when every work item in workItemResults has completed; otherwise false.
-        /// </returns>
-        public static bool WaitAll(
-            IWorkItemResult [] workItemResults,  
-            TimeSpan timeout,
-            bool exitContext,
-            WaitHandle cancelWaitHandle)
+        public override object[] GetStates()
         {
-            return WaitAll(workItemResults, (int)timeout.TotalMilliseconds, exitContext, cancelWaitHandle);
+            object[] states = _workItemsQueue.GetStates();
+            return states;
         }
 
         /// <summary>
-        /// Wait for all work items to complete
+        /// WorkItemsGroup start information (readonly)
         /// </summary>
-        /// <param name="workItemResults">Array of work item result objects</param>
-        /// <param name="millisecondsTimeout">The number of milliseconds to wait, or Timeout.Infinite (-1) to wait indefinitely.</param>
-        /// <param name="exitContext">
-        /// true to exit the synchronization domain for the context before the wait (if in a synchronized context), and reacquire it; otherwise, false. 
-        /// </param>
-        /// <returns>
-        /// true when every work item in workItemResults has completed; otherwise false.
-        /// </returns>
-        public static bool WaitAll(
-            IWorkItemResult [] workItemResults,  
-            int millisecondsTimeout,
-            bool exitContext)
+        public override WIGStartInfo WIGStartInfo
         {
-            return WorkItem.WaitAll(workItemResults, millisecondsTimeout, exitContext, null);
+            get { return _stpStartInfo.AsReadOnly(); }
         }
 
-        /// <summary>
-        /// Wait for all work items to complete
+            /// <summary>
+        /// Start the thread pool if it was started suspended.
+        /// If it is already running, this method is ignored.
         /// </summary>
-        /// <param name="workItemResults">Array of work item result objects</param>
-        /// <param name="millisecondsTimeout">The number of milliseconds to wait, or Timeout.Infinite (-1) to wait indefinitely.</param>
-        /// <param name="exitContext">
-        /// true to exit the synchronization domain for the context before the wait (if in a synchronized context), and reacquire it; otherwise, false. 
-        /// </param>
-        /// <param name="cancelWaitHandle">A cancel wait handle to interrupt the wait if needed</param>
-        /// <returns>
-        /// true when every work item in workItemResults has completed; otherwise false.
-        /// </returns>
-        public static bool WaitAll(
-            IWorkItemResult [] workItemResults,  
-            int millisecondsTimeout,
-            bool exitContext,
-            WaitHandle cancelWaitHandle)
+        public override void Start()
         {
-            return WorkItem.WaitAll(workItemResults, millisecondsTimeout, exitContext, cancelWaitHandle);
-        }
+            if (!_isSuspended)
+            {
+                return;
+            }
+            _isSuspended = false;
 
+            ICollection workItemsGroups = _workItemsGroups.Values;
+            foreach (WorkItemsGroup workItemsGroup in workItemsGroups)
+            {
+                workItemsGroup.OnSTPIsStarting();
+            }
 
-        /// <summary>
-        /// Waits for any of the work items in the specified array to complete, cancel, or timeout
-        /// </summary>
-        /// <param name="workItemResults">Array of work item result objects</param>
-        /// <returns>
-        /// The array index of the work item result that satisfied the wait, or WaitTimeout if any of the work items has been canceled.
-        /// </returns>
-        public static int WaitAny(
-            IWorkItemResult [] workItemResults)
-        {
-            return WaitAny(workItemResults, Timeout.Infinite, true);
+            StartOptimalNumberOfThreads();
         }
 
         /// <summary>
-        /// Waits for any of the work items in the specified array to complete, cancel, or timeout
+        /// Cancel all work items using thread abortion
         /// </summary>
-        /// <param name="workItemResults">Array of work item result objects</param>
-        /// <param name="timeout">The number of milliseconds to wait, or a TimeSpan that represents -1 milliseconds to wait indefinitely. </param>
-        /// <param name="exitContext">
-        /// true to exit the synchronization domain for the context before the wait (if in a synchronized context), and reacquire it; otherwise, false. 
-        /// </param>
-        /// <returns>
-        /// The array index of the work item result that satisfied the wait, or WaitTimeout if no work item result satisfied the wait and a time interval equivalent to millisecondsTimeout has passed or the work item has been canceled.
-        /// </returns>
-        public static int WaitAny(
-            IWorkItemResult [] workItemResults,
-            TimeSpan timeout,
-            bool exitContext)
+        /// <param name="abortExecution">True to stop work items by raising ThreadAbortException</param>
+        public override void Cancel(bool abortExecution)
         {
-            return WaitAny(workItemResults, (int)timeout.TotalMilliseconds, exitContext);
-        }
+            _canceledSmartThreadPool.IsCanceled = true;
+            _canceledSmartThreadPool = new CanceledWorkItemsGroup();
 
-        /// <summary>
-        /// Waits for any of the work items in the specified array to complete, cancel, or timeout
-        /// </summary>
-        /// <param name="workItemResults">Array of work item result objects</param>
-        /// <param name="timeout">The number of milliseconds to wait, or a TimeSpan that represents -1 milliseconds to wait indefinitely. </param>
-        /// <param name="exitContext">
-        /// true to exit the synchronization domain for the context before the wait (if in a synchronized context), and reacquire it; otherwise, false. 
-        /// </param>
-        /// <param name="cancelWaitHandle">A cancel wait handle to interrupt the wait if needed</param>
-        /// <returns>
-        /// The array index of the work item result that satisfied the wait, or WaitTimeout if no work item result satisfied the wait and a time interval equivalent to millisecondsTimeout has passed or the work item has been canceled.
-        /// </returns>
-        public static int WaitAny(
-            IWorkItemResult [] workItemResults,
-            TimeSpan timeout,
-            bool exitContext,
-            WaitHandle cancelWaitHandle)
-        {
-            return WaitAny(workItemResults, (int)timeout.TotalMilliseconds, exitContext, cancelWaitHandle);
+            ICollection workItemsGroups = _workItemsGroups.Values;
+            foreach (WorkItemsGroup workItemsGroup in workItemsGroups)
+            {
+                workItemsGroup.Cancel(abortExecution);
+            }
+
+            if (abortExecution)
+            {
+                foreach (ThreadEntry threadEntry in _workerThreads.Values)
+                {
+                    WorkItem workItem = threadEntry.CurrentWorkItem;
+                    if (null != workItem &&
+                        threadEntry.AssociatedSmartThreadPool == this &&
+                        !workItem.IsCanceled)
+                    {
+                        threadEntry.CurrentWorkItem.GetWorkItemResult().Cancel(true);
+                    }
+                }
+            }
         }
 
-        /// <summary>
-        /// Waits for any of the work items in the specified array to complete, cancel, or timeout
+            /// <summary>
+        /// Wait for the thread pool to be idle
         /// </summary>
-        /// <param name="workItemResults">Array of work item result objects</param>
-        /// <param name="millisecondsTimeout">The number of milliseconds to wait, or Timeout.Infinite (-1) to wait indefinitely.</param>
-        /// <param name="exitContext">
-        /// true to exit the synchronization domain for the context before the wait (if in a synchronized context), and reacquire it; otherwise, false. 
-        /// </param>
-        /// <returns>
-        /// The array index of the work item result that satisfied the wait, or WaitTimeout if no work item result satisfied the wait and a time interval equivalent to millisecondsTimeout has passed or the work item has been canceled.
-        /// </returns>
-        public static int WaitAny(
-            IWorkItemResult [] workItemResults,  
-            int millisecondsTimeout,
-            bool exitContext)
+        public override bool WaitForIdle(int millisecondsTimeout)
         {
-            return WorkItem.WaitAny(workItemResults, millisecondsTimeout, exitContext, null);
+            ValidateWaitForIdle();
+            return STPEventWaitHandle.WaitOne(_isIdleWaitHandle, millisecondsTimeout, false);
         }
 
         /// <summary>
-        /// Waits for any of the work items in the specified array to complete, cancel, or timeout
+        /// This event is fired when all work items are completed.
+        /// (When IsIdle changes to true)
+        /// This event only work on WorkItemsGroup. On SmartThreadPool
+        /// it throws the NotImplementedException.
         /// </summary>
-        /// <param name="workItemResults">Array of work item result objects</param>
-        /// <param name="millisecondsTimeout">The number of milliseconds to wait, or Timeout.Infinite (-1) to wait indefinitely.</param>
-        /// <param name="exitContext">
-        /// true to exit the synchronization domain for the context before the wait (if in a synchronized context), and reacquire it; otherwise, false. 
-        /// </param>
-        /// <param name="cancelWaitHandle">A cancel wait handle to interrupt the wait if needed</param>
-        /// <returns>
-        /// The array index of the work item result that satisfied the wait, or WaitTimeout if no work item result satisfied the wait and a time interval equivalent to millisecondsTimeout has passed or the work item has been canceled.
-        /// </returns>
-        public static int WaitAny(
-            IWorkItemResult [] workItemResults,  
-            int millisecondsTimeout,
-            bool exitContext,
-            WaitHandle cancelWaitHandle)
-        {
-            return WorkItem.WaitAny(workItemResults, millisecondsTimeout, exitContext, cancelWaitHandle);
-        }
-
-        public IWorkItemsGroup CreateWorkItemsGroup(int concurrency)
-        {
-            IWorkItemsGroup workItemsGroup = new WorkItemsGroup(this, concurrency, _stpStartInfo);
-            return workItemsGroup;
-        }
-
-        public IWorkItemsGroup CreateWorkItemsGroup(int concurrency, WIGStartInfo wigStartInfo)
-        {
-            IWorkItemsGroup workItemsGroup = new WorkItemsGroup(this, concurrency, wigStartInfo);
-            return workItemsGroup;
-        }
-
-        public event WorkItemsGroupIdleHandler OnIdle
+        public override event WorkItemsGroupIdleHandler OnIdle
         {
             add
             {
@@ -1283,166 +1618,115 @@ namespace Amib.Threading
             }
         }
 
-        public void Cancel()
-        {
-            ICollection workItemsGroups = _workItemsGroups.Values;
-            foreach(WorkItemsGroup workItemsGroup in workItemsGroups)
-            {
-                workItemsGroup.Cancel();
-            }
-        }
-
-        public void Start()
+            internal override void PreQueueWorkItem()
         {
-            lock (this)
-            {
-                if (!this._stpStartInfo.StartSuspended)
-                {
-                    return;
-                }
-                _stpStartInfo.StartSuspended = false;
-            }
-            
-            ICollection workItemsGroups = _workItemsGroups.Values;
-            foreach(WorkItemsGroup workItemsGroup in workItemsGroups)
-            {
-                workItemsGroup.OnSTPIsStarting();
-            }
-
-            StartOptimalNumberOfThreads();
+            ValidateNotDisposed();   
         }
 
         #endregion
 
-        #region Properties
+        #region Join, Choice, Pipe, etc.
 
         /// <summary>
-        /// Get/Set the name of the SmartThreadPool instance
+        /// Executes all actions in parallel.
+        /// Returns when they all finish.
         /// </summary>
-        public string Name 
-        { 
-            get
-            {
-                return _name;
-            }
-
-            set
-            {
-                _name = value;
-            }
-        }
-
-        /// <summary>
-        /// Get the lower limit of threads in the pool.
-        /// </summary>
-        public int MinThreads 
-        { 
-            get 
+        /// <param name="actions">Actions to execute</param>
+        public void Join(IEnumerable<Action> actions)
+        {
+            WIGStartInfo wigStartInfo = new WIGStartInfo { StartSuspended = true };
+            IWorkItemsGroup workItemsGroup = CreateWorkItemsGroup(int.MaxValue, wigStartInfo);
+            foreach (Action action in actions)
             {
-                ValidateNotDisposed();
-                return _stpStartInfo.MinWorkerThreads; 
+                workItemsGroup.QueueWorkItem(action);
             }
+            workItemsGroup.Start();
+            workItemsGroup.WaitForIdle();
         }
 
         /// <summary>
-        /// Get the upper limit of threads in the pool.
-        /// </summary>
-        public int MaxThreads 
-        { 
-            get 
-            {
-                ValidateNotDisposed();
-                return _stpStartInfo.MaxWorkerThreads; 
-            } 
-        }
-        /// <summary>
-        /// Get the number of threads in the thread pool.
-        /// Should be between the lower and the upper limits.
+        /// Executes all actions in parallel.
+        /// Returns when they all finish.
         /// </summary>
-        public int ActiveThreads 
-        { 
-            get 
-            {
-                ValidateNotDisposed();
-                return _workerThreads.Count; 
-            } 
+        /// <param name="actions">Actions to execute</param>
+        public void Join(params Action[] actions)
+        {
+            Join((IEnumerable<Action>)actions);
         }
 
-        /// <summary>
-        /// Get the number of busy (not idle) threads in the thread pool.
-        /// </summary>
-        public int InUseThreads 
-        { 
-            get 
-            { 
-                ValidateNotDisposed();
-                return _inUseWorkerThreads; 
-            } 
+        private class ChoiceIndex
+        {
+            public int _index = -1;
         }
 
         /// <summary>
-        /// Get the number of work items in the queue.
+        /// Executes all actions in parallel
+        /// Returns when the first one completes
         /// </summary>
-        public int WaitingCallbacks 
-        { 
-            get 
-            { 
-                ValidateNotDisposed();
-                return _workItemsQueue.Count;
-            } 
-        }
+        /// <param name="actions">Actions to execute</param>
+        public int Choice(IEnumerable<Action> actions)
+        {
+            WIGStartInfo wigStartInfo = new WIGStartInfo { StartSuspended = true };
+            IWorkItemsGroup workItemsGroup = CreateWorkItemsGroup(int.MaxValue, wigStartInfo);
 
+            ManualResetEvent anActionCompleted = new ManualResetEvent(false);
 
-        public event EventHandler Idle
-        {
-            add
+            ChoiceIndex choiceIndex = new ChoiceIndex();
+            
+            int i = 0;
+            foreach (Action action in actions)
             {
-                _stpIdle += value;
+                Action act = action;
+                int value = i;
+                workItemsGroup.QueueWorkItem(() => { act(); Interlocked.CompareExchange(ref choiceIndex._index, value, -1); anActionCompleted.Set(); });
+                ++i;
             }
+                workItemsGroup.Start();
+            anActionCompleted.WaitOne();
 
-            remove
-            {
-                _stpIdle -= value;
-            }
+            return choiceIndex._index;
         }
 
-        #endregion
-
-        #region IDisposable Members
-
-//        ~SmartThreadPool()
-//        {
-//            Dispose();
-//        }
+        /// <summary>
+        /// Executes all actions in parallel
+        /// Returns when the first one completes
+        /// </summary>
+        /// <param name="actions">Actions to execute</param>
+        public int Choice(params Action[] actions)
+            {
+            return Choice((IEnumerable<Action>)actions);
+        }
 
-        public void Dispose()
+        /// <summary>
+        /// Executes actions in sequence asynchronously.
+        /// Returns immediately.
+        /// </summary>
+        /// <param name="pipeState">A state context that passes </param>
+        /// <param name="actions">Actions to execute in the order they should run</param>
+        public void Pipe<T>(T pipeState, IEnumerable<Action<T>> actions)
         {
-            if (!_isDisposed)
+            WIGStartInfo wigStartInfo = new WIGStartInfo { StartSuspended = true };
+            IWorkItemsGroup workItemsGroup = CreateWorkItemsGroup(1, wigStartInfo);
+            foreach (Action<T> action in actions)
             {
-                if (!_shutdown)
-                {
-                    Shutdown();
-                }
-
-                if (null != _shuttingDownEvent)
-                {
-                    _shuttingDownEvent.Close();
-                    _shuttingDownEvent = null;
-                }
-                _workerThreads.Clear();
-                _isDisposed = true;
-                GC.SuppressFinalize(this);
+                Action<T> act = action;
+                workItemsGroup.QueueWorkItem(() => act(pipeState));
             }
+            workItemsGroup.Start();
+            workItemsGroup.WaitForIdle();
         }
 
-        private void ValidateNotDisposed()
+        /// <summary>
+        /// Executes actions in sequence asynchronously.
+        /// Returns immediately.
+        /// </summary>
+        /// <param name="pipeState"></param>
+        /// <param name="actions">Actions to execute in the order they should run</param>
+        public void Pipe<T>(T pipeState, params Action<T>[] actions)
         {
-            if(_isDisposed)
-            {
-                throw new ObjectDisposedException(GetType().ToString(), "The SmartThreadPool has been shutdown");
-            }
+            Pipe(pipeState, (IEnumerable<Action<T>>)actions);
         }
         #endregion
-    }
-    #endregion
+        }
+        #endregion
 }
diff --git a/ThirdParty/SmartThreadPool/SynchronizedDictionary.cs b/ThirdParty/SmartThreadPool/SynchronizedDictionary.cs
new file mode 100644
index 0000000..0cce19f
--- /dev/null
+++ b/ThirdParty/SmartThreadPool/SynchronizedDictionary.cs
@@ -0,0 +1,89 @@
+using System.Collections.Generic;
+
+namespace Amib.Threading.Internal
+{
+    internal class SynchronizedDictionary<TKey, TValue>
+    {
+        private readonly Dictionary<TKey, TValue> _dictionary;
+        private readonly object _lock;
+
+        public SynchronizedDictionary()
+        {
+            _lock = new object();
+            _dictionary = new Dictionary<TKey, TValue>();
+        }
+
+        public int Count
+        {
+            get { return _dictionary.Count; }
+        }
+
+        public bool Contains(TKey key)
+        {
+            lock (_lock)
+            {
+                return _dictionary.ContainsKey(key);
+            }
+        }
+
+        public void Remove(TKey key)
+        {
+            lock (_lock)
+            {
+                _dictionary.Remove(key);
+            }
+        }
+
+        public object SyncRoot
+        {
+            get { return _lock; }
+        }
+
+        public TValue this[TKey key]
+        {
+            get
+            {
+                lock (_lock)
+                {
+                    return _dictionary[key];
+                }
+            }
+            set
+            {
+                lock (_lock)
+                {
+                    _dictionary[key] = value;
+                }
+            }
+        }
+
+        public Dictionary<TKey, TValue>.KeyCollection Keys
+        {
+            get
+            {
+                lock (_lock)
+                {
+                    return _dictionary.Keys;
+                }
+            }
+        }
+
+        public Dictionary<TKey, TValue>.ValueCollection Values
+        {
+            get
+            {
+                lock (_lock)
+                {
+                    return _dictionary.Values;
+                }
+            }
+        }
+        public void Clear()
+        {
+            lock (_lock)
+            {
+                _dictionary.Clear();
+            }
+        }
+    }
+}
diff --git a/ThirdParty/SmartThreadPool/WIGStartInfo.cs b/ThirdParty/SmartThreadPool/WIGStartInfo.cs
index 150317f..8af195b 100644
--- a/ThirdParty/SmartThreadPool/WIGStartInfo.cs
+++ b/ThirdParty/SmartThreadPool/WIGStartInfo.cs
@@ -1,99 +1,171 @@
-// Ami Bar
-// amibar@gmail.com
+using System;
 
 namespace Amib.Threading
 {
-    /// <summary>
-    /// Summary description for WIGStartInfo.
-    /// </summary>
-    public class WIGStartInfo
-    {
-        /// <summary>
-        /// Use the caller's security context
-        /// </summary>
+        /// <summary>
+        /// Summary description for WIGStartInfo.
+        /// </summary>
+        public class WIGStartInfo
+        {
         private bool _useCallerCallContext;
-
-        /// <summary>
-        /// Use the caller's HTTP context
-        /// </summary>
         private bool _useCallerHttpContext;
-
-        /// <summary>
-        /// Dispose of the state object of a work item
-        /// </summary>
         private bool _disposeOfStateObjects;
-
-        /// <summary>
-        /// The option to run the post execute
-        /// </summary>
         private CallToPostExecute _callToPostExecute;
-
-        /// <summary>
-        /// A post execute callback to call when none is provided in 
-        /// the QueueWorkItem method.
-        /// </summary>
         private PostExecuteWorkItemCallback _postExecuteWorkItemCallback;
-
-        /// <summary>
-        /// Indicate the WorkItemsGroup to suspend the handling of the work items
-        /// until the Start() method is called.
-        /// </summary>
         private bool _startSuspended;
+        private WorkItemPriority _workItemPriority;
+        private bool _fillStateWithArgs;
 
-        public WIGStartInfo()
+        protected bool _readOnly;
+
+            public WIGStartInfo()
         {
-            _useCallerCallContext = SmartThreadPool.DefaultUseCallerCallContext;
-            _useCallerHttpContext = SmartThreadPool.DefaultUseCallerHttpContext;
-            _disposeOfStateObjects = SmartThreadPool.DefaultDisposeOfStateObjects;
-            _callToPostExecute = SmartThreadPool.DefaultCallToPostExecute;
-            _postExecuteWorkItemCallback = SmartThreadPool.DefaultPostExecuteWorkItemCallback;
+                _fillStateWithArgs = SmartThreadPool.DefaultFillStateWithArgs;
+                _workItemPriority = SmartThreadPool.DefaultWorkItemPriority;
             _startSuspended = SmartThreadPool.DefaultStartSuspended;
+            _postExecuteWorkItemCallback = SmartThreadPool.DefaultPostExecuteWorkItemCallback;
+            _callToPostExecute = SmartThreadPool.DefaultCallToPostExecute;
+            _disposeOfStateObjects = SmartThreadPool.DefaultDisposeOfStateObjects;
+            _useCallerHttpContext = SmartThreadPool.DefaultUseCallerHttpContext;
+            _useCallerCallContext = SmartThreadPool.DefaultUseCallerCallContext;
         }
 
-        public WIGStartInfo(WIGStartInfo wigStartInfo)
+            public WIGStartInfo(WIGStartInfo wigStartInfo)
         {
-            _useCallerCallContext = wigStartInfo._useCallerCallContext;
-            _useCallerHttpContext = wigStartInfo._useCallerHttpContext;
-            _disposeOfStateObjects = wigStartInfo._disposeOfStateObjects;
-            _callToPostExecute = wigStartInfo._callToPostExecute;
-            _postExecuteWorkItemCallback = wigStartInfo._postExecuteWorkItemCallback;
-            _startSuspended = wigStartInfo._startSuspended;
+            _useCallerCallContext = wigStartInfo.UseCallerCallContext;
+            _useCallerHttpContext = wigStartInfo.UseCallerHttpContext;
+            _disposeOfStateObjects = wigStartInfo.DisposeOfStateObjects;
+            _callToPostExecute = wigStartInfo.CallToPostExecute;
+            _postExecuteWorkItemCallback = wigStartInfo.PostExecuteWorkItemCallback;
+            _workItemPriority = wigStartInfo.WorkItemPriority;
+            _startSuspended = wigStartInfo.StartSuspended;
+            _fillStateWithArgs = wigStartInfo.FillStateWithArgs;
         }
 
-        public bool UseCallerCallContext
+        protected void ThrowIfReadOnly()
         {
-            get { return _useCallerCallContext; }
-            set { _useCallerCallContext = value; }
+            if (_readOnly)
+            {
+                throw new NotSupportedException("This is a readonly instance and set is not supported");
+            }
         }
 
-        public bool UseCallerHttpContext
-        {
-            get { return _useCallerHttpContext; }
-            set { _useCallerHttpContext = value; }
-        }
+            /// <summary>
+            /// Get/Set if to use the caller's security context
+            /// </summary>
+            public virtual bool UseCallerCallContext
+            {
+                get { return _useCallerCallContext; }
+            set 
+            { 
+                ThrowIfReadOnly();  
+                _useCallerCallContext = value; 
+            }
+            }
 
-        public bool DisposeOfStateObjects
-        {
-            get { return _disposeOfStateObjects; }
-            set { _disposeOfStateObjects = value; }
-        }
 
-        public CallToPostExecute CallToPostExecute
-        {
-            get { return _callToPostExecute; }
-            set { _callToPostExecute = value; }
-        }
+            /// <summary>
+            /// Get/Set if to use the caller's HTTP context
+            /// </summary>
+            public virtual bool UseCallerHttpContext
+            {
+                get { return _useCallerHttpContext; }
+            set 
+            { 
+                ThrowIfReadOnly();  
+                _useCallerHttpContext = value; 
+            }
+            }
 
-        public PostExecuteWorkItemCallback PostExecuteWorkItemCallback
-        {
-            get { return _postExecuteWorkItemCallback; }
-            set { _postExecuteWorkItemCallback = value; }
-        }
 
-        public bool StartSuspended
-        {
-            get { return _startSuspended; }
-            set { _startSuspended = value; }
-        }
+            /// <summary>
+            /// Get/Set if to dispose of the state object of a work item
+            /// </summary>
+            public virtual bool DisposeOfStateObjects
+            {
+                get { return _disposeOfStateObjects; }
+            set 
+            { 
+                ThrowIfReadOnly();  
+                _disposeOfStateObjects = value; 
+            }
+            }
+
+
+            /// <summary>
+            /// Get/Set the run the post execute options
+            /// </summary>
+            public virtual CallToPostExecute CallToPostExecute
+            {
+                get { return _callToPostExecute; }
+            set 
+            { 
+                ThrowIfReadOnly();  
+                _callToPostExecute = value; 
+            }
+            }
+
+
+            /// <summary>
+            /// Get/Set the default post execute callback
+            /// </summary>
+            public virtual PostExecuteWorkItemCallback PostExecuteWorkItemCallback
+            {
+                get { return _postExecuteWorkItemCallback; }
+            set 
+            { 
+                ThrowIfReadOnly();  
+                _postExecuteWorkItemCallback = value; 
+            }
+            }
+
+
+            /// <summary>
+            /// Get/Set if the work items execution should be suspended until the Start()
+            /// method is called.
+            /// </summary>
+            public virtual bool StartSuspended
+            {
+                get { return _startSuspended; }
+            set 
+            { 
+                ThrowIfReadOnly();  
+                _startSuspended = value; 
+            }
+            }
+
+
+            /// <summary>
+            /// Get/Set the default priority that a work item gets when it is enqueued
+            /// </summary>
+            public virtual WorkItemPriority WorkItemPriority
+            {
+                get { return _workItemPriority; }
+                set { _workItemPriority = value; }
+            }
+
+            /// <summary>
+        /// Get/Set the if QueueWorkItem of Action&lt;...&gt;/Func&lt;...&gt; fill the
+            /// arguments as an object array into the state of the work item.
+            /// The arguments can be access later by IWorkItemResult.State.
+            /// </summary>
+            public virtual bool FillStateWithArgs
+            {
+                get { return _fillStateWithArgs; }
+            set 
+            { 
+                ThrowIfReadOnly();  
+                _fillStateWithArgs = value; 
+            }
+            }
+
+            /// <summary>
+        /// Get a readonly version of this WIGStartInfo
+        /// </summary>
+        /// <returns>Returns a readonly reference to this WIGStartInfoRO</returns>
+        public WIGStartInfo AsReadOnly()
+            {
+            return new WIGStartInfo(this) { _readOnly = true };
+            }
     }
 }
diff --git a/ThirdParty/SmartThreadPool/WorkItem.WorkItemResult.cs b/ThirdParty/SmartThreadPool/WorkItem.WorkItemResult.cs
new file mode 100644
index 0000000..435a14b
--- /dev/null
+++ b/ThirdParty/SmartThreadPool/WorkItem.WorkItemResult.cs
@@ -0,0 +1,190 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+using System.Threading;
+
+namespace Amib.Threading.Internal
+{
+    public partial class WorkItem
+    {
+        #region WorkItemResult class
+
+        private class WorkItemResult : IWorkItemResult, IInternalWorkItemResult, IInternalWaitableResult
+        {
+            /// <summary>
+            /// A back reference to the work item
+            /// </summary>
+            private readonly WorkItem _workItem;
+
+            public WorkItemResult(WorkItem workItem)
+            {
+                _workItem = workItem;
+            }
+
+            internal WorkItem GetWorkItem()
+            {
+                return _workItem;
+            }
+
+            #region IWorkItemResult Members
+
+            public bool IsCompleted
+            {
+                get
+                {
+                    return _workItem.IsCompleted;
+                }
+            }
+
+            public bool IsCanceled
+            {
+                get
+                {
+                    return _workItem.IsCanceled;
+                }
+            }
+
+            public object GetResult()
+            {
+                return _workItem.GetResult(Timeout.Infinite, true, null);
+            }
+
+            public object GetResult(int millisecondsTimeout, bool exitContext)
+            {
+                return _workItem.GetResult(millisecondsTimeout, exitContext, null);
+            }
+
+            public object GetResult(TimeSpan timeout, bool exitContext)
+            {
+                return _workItem.GetResult((int)timeout.TotalMilliseconds, exitContext, null);
+            }
+
+            public object GetResult(int millisecondsTimeout, bool exitContext, WaitHandle cancelWaitHandle)
+            {
+                return _workItem.GetResult(millisecondsTimeout, exitContext, cancelWaitHandle);
+            }
+
+            public object GetResult(TimeSpan timeout, bool exitContext, WaitHandle cancelWaitHandle)
+            {
+                return _workItem.GetResult((int)timeout.TotalMilliseconds, exitContext, cancelWaitHandle);
+            }
+
+            public object GetResult(out Exception e)
+            {
+                return _workItem.GetResult(Timeout.Infinite, true, null, out e);
+            }
+
+            public object GetResult(int millisecondsTimeout, bool exitContext, out Exception e)
+            {
+                return _workItem.GetResult(millisecondsTimeout, exitContext, null, out e);
+            }
+
+            public object GetResult(TimeSpan timeout, bool exitContext, out Exception e)
+            {
+                return _workItem.GetResult((int)timeout.TotalMilliseconds, exitContext, null, out e);
+            }
+
+            public object GetResult(int millisecondsTimeout, bool exitContext, WaitHandle cancelWaitHandle, out Exception e)
+            {
+                return _workItem.GetResult(millisecondsTimeout, exitContext, cancelWaitHandle, out e);
+            }
+
+            public object GetResult(TimeSpan timeout, bool exitContext, WaitHandle cancelWaitHandle, out Exception e)
+            {
+                return _workItem.GetResult((int)timeout.TotalMilliseconds, exitContext, cancelWaitHandle, out e);
+            }
+
+            public bool Cancel()
+            {
+                return Cancel(false);
+            }
+
+            public bool Cancel(bool abortExecution)
+            {
+                return _workItem.Cancel(abortExecution);
+            }
+
+            public object State
+            {
+                get
+                {
+                    return _workItem._state;
+                }
+            }
+
+            public WorkItemPriority WorkItemPriority
+            {
+                get
+                {
+                    return _workItem._workItemInfo.WorkItemPriority;
+                }
+            }
+
+            /// <summary>
+            /// Return the result, same as GetResult()
+            /// </summary>
+            public object Result
+            {
+                get { return GetResult(); }
+            }
+
+            /// <summary>
+            /// Returns the exception if occured otherwise returns null.
+            /// This value is valid only after the work item completed,
+            /// before that it is always null.
+            /// </summary>
+            public object Exception
+            {
+                get { return _workItem._exception; }
+            }
+
+            #endregion
+
+            #region IInternalWorkItemResult Members
+
+            public event WorkItemStateCallback OnWorkItemStarted
+            {
+                add
+                {
+                    _workItem.OnWorkItemStarted += value;
+                }
+                remove
+                {
+                    _workItem.OnWorkItemStarted -= value;
+                }
+            }
+
+
+            public event WorkItemStateCallback OnWorkItemCompleted
+            {
+                add
+                {
+                    _workItem.OnWorkItemCompleted += value;
+                }
+                remove
+                {
+                    _workItem.OnWorkItemCompleted -= value;
+                }
+            }
+
+            #endregion
+
+            #region IInternalWorkItemResult Members
+
+            public IWorkItemResult GetWorkItemResult()
+            {
+                return this;
+            }
+
+            public IWorkItemResult<TResult> GetWorkItemResultT<TResult>()
+            {
+                return new WorkItemResultTWrapper<TResult>(this);
+            }
+
+            #endregion
+        }
+
+        #endregion
+
+    }
+}
diff --git a/ThirdParty/SmartThreadPool/WorkItem.cs b/ThirdParty/SmartThreadPool/WorkItem.cs
index d0c0524..185f10c 100644
--- a/ThirdParty/SmartThreadPool/WorkItem.cs
+++ b/ThirdParty/SmartThreadPool/WorkItem.cs
@@ -1,58 +1,13 @@
-// Ami Bar
-// amibar@gmail.com
-
 using System;
 using System.Threading;
 using System.Diagnostics;
 
 namespace Amib.Threading.Internal
 {
-    #region WorkItem Delegate
-
-    /// <summary>
-    /// An internal delegate to call when the WorkItem starts or completes
-    /// </summary>
-    internal delegate void WorkItemStateCallback(WorkItem workItem);
-
-    #endregion
-
-    #region IInternalWorkItemResult interface 
-
-    public class CanceledWorkItemsGroup
-    {
-        public readonly static CanceledWorkItemsGroup NotCanceledWorkItemsGroup = new CanceledWorkItemsGroup();
-
-        private bool _isCanceled = false;
-        public bool IsCanceled 
-        { 
-            get { return _isCanceled; }
-            set { _isCanceled = value; }
-        }
-    }
-
-    internal interface IInternalWorkItemResult
-    {
-        event WorkItemStateCallback OnWorkItemStarted;
-        event WorkItemStateCallback OnWorkItemCompleted;
-    }
-
-    #endregion
-
-    #region IWorkItem interface
-
-    public interface IWorkItem
-    {
-
-    }
-
-    #endregion
-
-    #region WorkItem class
-
     /// <summary>
     /// Holds a callback delegate and the state for that delegate.
     /// </summary>
-    public class WorkItem : IHasWorkItemPriority, IWorkItem
+    public partial class WorkItem : IHasWorkItemPriority
     {
         #region WorkItemState enum
 
@@ -61,33 +16,57 @@ namespace Amib.Threading.Internal
         /// </summary>
         private enum WorkItemState
         {
-            InQueue,
-            InProgress,
-            Completed,
-            Canceled,
+            InQueue = 0,    // Nexts: InProgress, Canceled
+            InProgress = 1,    // Nexts: Completed, Canceled
+            Completed = 2,    // Stays Completed
+            Canceled = 3,    // Stays Canceled
         }
 
-        #endregion
+        private static bool IsValidStatesTransition(WorkItemState currentState, WorkItemState nextState)
+        {
+            bool valid = false;
+
+            switch (currentState)
+            {
+                case WorkItemState.InQueue:
+                    valid = (WorkItemState.InProgress == nextState) || (WorkItemState.Canceled == nextState);
+                    break;
+                case WorkItemState.InProgress:
+                    valid = (WorkItemState.Completed == nextState) || (WorkItemState.Canceled == nextState);
+                    break;
+                case WorkItemState.Completed:
+                case WorkItemState.Canceled:
+                    // Cannot be changed
+                    break;
+                default:
+                    // Unknown state
+                    Debug.Assert(false);
+                    break;
+            }
 
-        #region Member Variables
+            return valid;
+        }
 
-        public Thread currentThread;
+        #endregion
+
+        #region Fields
 
         /// <summary>
         /// Callback delegate for the callback.
         /// </summary>
-        private WorkItemCallback _callback;
+        private readonly WorkItemCallback _callback;
 
         /// <summary>
         /// State with which to call the callback delegate.
         /// </summary>
         private object _state;
 
+#if !(_WINDOWS_CE) && !(_SILVERLIGHT) && !(WINDOWS_PHONE)
         /// <summary>
         /// Stores the caller's context
         /// </summary>
-        private CallerThreadContext _callerContext;
-
+        private readonly CallerThreadContext _callerContext;
+#endif
         /// <summary>
         /// Holds the result of the mehtod
         /// </summary>
@@ -117,12 +96,12 @@ namespace Amib.Threading.Internal
         /// <summary>
         /// Represents the result state of the work item
         /// </summary>
-        private WorkItemResult _workItemResult;
+        private readonly WorkItemResult _workItemResult;
 
         /// <summary>
         /// Work item info
         /// </summary>
-        private WorkItemInfo _workItemInfo;
+        private readonly WorkItemInfo _workItemInfo;
 
         /// <summary>
         /// Called when the WorkItem starts
@@ -141,30 +120,41 @@ namespace Amib.Threading.Internal
         private CanceledWorkItemsGroup _canceledWorkItemsGroup = CanceledWorkItemsGroup.NotCanceledWorkItemsGroup;
 
         /// <summary>
+        /// A reference to an object that indicates whatever the 
+        /// SmartThreadPool has been canceled
+        /// </summary>
+        private CanceledWorkItemsGroup _canceledSmartThreadPool = CanceledWorkItemsGroup.NotCanceledWorkItemsGroup;
+
+        /// <summary>
         /// The work item group this work item belong to.
-        /// 
         /// </summary>
-        private IWorkItemsGroup _workItemsGroup;
+        private readonly IWorkItemsGroup _workItemsGroup;
 
-        #region Performance Counter fields
+        /// <summary>
+        /// The thread that executes this workitem.
+        /// This field is available for the period when the work item is executed, before and after it is null.
+        /// </summary>
+        private Thread _executingThread;
 
         /// <summary>
-        /// The time when the work items is queued.
-        /// Used with the performance counter.
+        /// The absulote time when the work item will be timeout
         /// </summary>
-        private DateTime _queuedTime;
+        private long _expirationTime;
+
+        #region Performance Counter fields
+
+
+
 
         /// <summary>
-        /// The time when the work items starts its execution.
-        /// Used with the performance counter.
+        /// Stores how long the work item waited on the stp queue
         /// </summary>
-        private DateTime _beginProcessTime;
+        private Stopwatch _waitingOnQueueStopwatch;
 
         /// <summary>
-        /// The time when the work items ends its execution.
-        /// Used with the performance counter.
+        /// Stores how much time it took the work item to execute after it went out of the queue
         /// </summary>
-        private DateTime _endProcessTime;
+        private Stopwatch _processingStopwatch;
 
         #endregion
 
@@ -174,17 +164,25 @@ namespace Amib.Threading.Internal
 
         public TimeSpan WaitingTime
         {
-            get 
+            get
             {
-                return (_beginProcessTime - _queuedTime);
+                return _waitingOnQueueStopwatch.Elapsed;
             }
         }
 
         public TimeSpan ProcessTime
         {
-            get 
+            get
+            {
+                return _processingStopwatch.Elapsed;
+            }
+        }
+
+        internal WorkItemInfo WorkItemInfo
+        {
+            get
             {
-                return (_endProcessTime - _beginProcessTime);
+                return _workItemInfo;
             }
         }
 
@@ -195,6 +193,8 @@ namespace Amib.Threading.Internal
         /// <summary>
         /// Initialize the callback holding object.
         /// </summary>
+        /// <param name="workItemsGroup">The workItemGroup of the workitem</param>
+        /// <param name="workItemInfo">The WorkItemInfo of te workitem</param>
         /// <param name="callback">Callback delegate for the callback.</param>
         /// <param name="state">State with which to call the callback delegate.</param>
         /// 
@@ -203,16 +203,18 @@ namespace Amib.Threading.Internal
         public WorkItem(
             IWorkItemsGroup workItemsGroup,
             WorkItemInfo workItemInfo,
-            WorkItemCallback callback, 
+            WorkItemCallback callback,
             object state)
         {
             _workItemsGroup = workItemsGroup;
             _workItemInfo = workItemInfo;
 
+#if !(_WINDOWS_CE) && !(_SILVERLIGHT) && !(WINDOWS_PHONE)
             if (_workItemInfo.UseCallerCallContext || _workItemInfo.UseCallerHttpContext)
             {
                 _callerContext = CallerThreadContext.Capture(_workItemInfo.UseCallerCallContext, _workItemInfo.UseCallerHttpContext);
             }
+#endif
 
             _callback = callback;
             _state = state;
@@ -222,9 +224,18 @@ namespace Amib.Threading.Internal
 
         internal void Initialize()
         {
+            // The _workItemState is changed directly instead of using the SetWorkItemState
+            // method since we don't want to go throught IsValidStateTransition.
             _workItemState = WorkItemState.InQueue;
+
             _workItemCompleted = null;
             _workItemCompletedRefCount = 0;
+            _waitingOnQueueStopwatch = new Stopwatch();
+            _processingStopwatch = new Stopwatch();
+            _expirationTime =
+                _workItemInfo.Timeout > 0 ?
+                DateTime.UtcNow.Ticks + _workItemInfo.Timeout * TimeSpan.TicksPerMillisecond :
+                long.MaxValue;
         }
 
         internal bool WasQueuedBy(IWorkItemsGroup workItemsGroup)
@@ -237,17 +248,16 @@ namespace Amib.Threading.Internal
 
         #region Methods
 
-        public CanceledWorkItemsGroup CanceledWorkItemsGroup
+        internal CanceledWorkItemsGroup CanceledWorkItemsGroup
         {
-            get
-            {
-                return _canceledWorkItemsGroup;
-            }
+            get { return _canceledWorkItemsGroup; }
+            set { _canceledWorkItemsGroup = value; }
+        }
 
-            set
-            {
-                _canceledWorkItemsGroup = value;
-            }
+        internal CanceledWorkItemsGroup CanceledSmartThreadPool
+        {
+            get { return _canceledSmartThreadPool; }
+            set { _canceledSmartThreadPool = value; }
         }
 
         /// <summary>
@@ -259,9 +269,10 @@ namespace Amib.Threading.Internal
         /// </returns>
         public bool StartingWorkItem()
         {
-            _beginProcessTime = DateTime.Now;
+            _waitingOnQueueStopwatch.Stop();
+            _processingStopwatch.Start();
 
-            lock(this)
+            lock (this)
             {
                 if (IsCanceled)
                 {
@@ -277,6 +288,9 @@ namespace Amib.Threading.Internal
 
                 Debug.Assert(WorkItemState.InQueue == GetWorkItemState());
 
+                // No need for a lock yet, only after the state has changed to InProgress
+                _executingThread = Thread.CurrentThread;
+
                 SetWorkItemState(WorkItemState.InProgress);
             }
 
@@ -291,7 +305,7 @@ namespace Amib.Threading.Internal
             CallToPostExecute currentCallToPostExecute = 0;
 
             // Execute the work item if we are in the correct state
-            switch(GetWorkItemState())
+            switch (GetWorkItemState())
             {
                 case WorkItemState.InProgress:
                     currentCallToPostExecute |= CallToPostExecute.WhenWorkItemNotCanceled;
@@ -311,7 +325,7 @@ namespace Amib.Threading.Internal
                 PostExecute();
             }
 
-            _endProcessTime = DateTime.Now;
+            _processingStopwatch.Stop();
         }
 
         internal void FireWorkItemCompleted()
@@ -323,8 +337,21 @@ namespace Amib.Threading.Internal
                     _workItemCompletedEvent(this);
                 }
             }
-            catch // Ignore exceptions
-            {}
+            catch // Suppress exceptions
+            { }
+        }
+
+        internal void FireWorkItemStarted()
+        {
+            try
+            {
+                if (null != _workItemStartedEvent)
+                {
+                    _workItemStartedEvent(this);
+                }
+            }
+            catch // Suppress exceptions
+            { }
         }
 
         /// <summary>
@@ -332,32 +359,70 @@ namespace Amib.Threading.Internal
         /// </summary>
         private void ExecuteWorkItem()
         {
+
+#if !(_WINDOWS_CE) && !(_SILVERLIGHT) && !(WINDOWS_PHONE)
             CallerThreadContext ctc = null;
             if (null != _callerContext)
             {
                 ctc = CallerThreadContext.Capture(_callerContext.CapturedCallContext, _callerContext.CapturedHttpContext);
                 CallerThreadContext.Apply(_callerContext);
             }
+#endif
 
             Exception exception = null;
             object result = null;
 
             try
             {
-                result = _callback(_state);
+                try
+                {
+                    result = _callback(_state);
+                }
+                catch (Exception e)
+                {
+                    // Save the exception so we can rethrow it later
+                    exception = e;
+                }
+
+                // Remove the value of the execution thread, so it will be impossible to cancel the work item,
+                // since it is already completed.
+                // Cancelling a work item that already completed may cause the abortion of the next work item!!!
+                Thread executionThread = Interlocked.CompareExchange(ref _executingThread, null, _executingThread);
+
+                if (null == executionThread)
+                {
+                    // Oops! we are going to be aborted..., Wait here so we can catch the ThreadAbortException
+                    Thread.Sleep(60 * 1000);
+
+                    // If after 1 minute this thread was not aborted then let it continue working.
+                }
             }
-            catch (Exception e) 
+            // We must treat the ThreadAbortException or else it will be stored in the exception variable
+            catch (ThreadAbortException tae)
             {
-                // Save the exception so we can rethrow it later
-                exception = e;
+                tae.GetHashCode();
+                // Check if the work item was cancelled
+                // If we got a ThreadAbortException and the STP is not shutting down, it means the 
+                // work items was cancelled.
+                if (!SmartThreadPool.CurrentThreadEntry.AssociatedSmartThreadPool.IsShuttingdown)
+                {
+#if !(_WINDOWS_CE) && !(_SILVERLIGHT) && !(WINDOWS_PHONE)
+                    Thread.ResetAbort();
+#endif
+                }
             }
-        
+
+#if !(_WINDOWS_CE) && !(_SILVERLIGHT) && !(WINDOWS_PHONE)
             if (null != _callerContext)
             {
                 CallerThreadContext.Apply(ctc);
             }
+#endif
 
-            SetResult(result, exception);
+            if (!SmartThreadPool.IsWorkItemCanceled)
+            {
+                SetResult(result, exception);
+            }
         }
 
         /// <summary>
@@ -369,9 +434,9 @@ namespace Amib.Threading.Internal
             {
                 try
                 {
-                    _workItemInfo.PostExecuteWorkItemCallback(this._workItemResult);
+                    _workItemInfo.PostExecuteWorkItemCallback(_workItemResult);
                 }
-                catch (Exception e) 
+                catch (Exception e)
                 {
                     Debug.Assert(null != e);
                 }
@@ -382,6 +447,8 @@ namespace Amib.Threading.Internal
         /// Set the result of the work item to return
         /// </summary>
         /// <param name="result">The result of the work item</param>
+        /// <param name="exception">The exception that was throw while the workitem executed, null
+        /// if there was no exception.</param>
         internal void SetResult(object result, Exception exception)
         {
             _result = result;
@@ -401,48 +468,48 @@ namespace Amib.Threading.Internal
         /// <summary>
         /// Wait for all work items to complete
         /// </summary>
-        /// <param name="workItemResults">Array of work item result objects</param>
+        /// <param name="waitableResults">Array of work item result objects</param>
         /// <param name="millisecondsTimeout">The number of milliseconds to wait, or Timeout.Infinite (-1) to wait indefinitely.</param>
         /// <param name="exitContext">
         /// true to exit the synchronization domain for the context before the wait (if in a synchronized context), and reacquire it; otherwise, false. 
         /// </param>
         /// <param name="cancelWaitHandle">A cancel wait handle to interrupt the wait if needed</param>
         /// <returns>
-        /// true when every work item in workItemResults has completed; otherwise false.
+        /// true when every work item in waitableResults has completed; otherwise false.
         /// </returns>
         internal static bool WaitAll(
-            IWorkItemResult [] workItemResults,
+            IWaitableResult[] waitableResults,
             int millisecondsTimeout,
             bool exitContext,
             WaitHandle cancelWaitHandle)
         {
-            if (0 == workItemResults.Length)
+            if (0 == waitableResults.Length)
             {
                 return true;
             }
 
             bool success;
-            WaitHandle [] waitHandles = new WaitHandle[workItemResults.Length];;
-            GetWaitHandles(workItemResults, waitHandles);
+            WaitHandle[] waitHandles = new WaitHandle[waitableResults.Length];
+            GetWaitHandles(waitableResults, waitHandles);
 
             if ((null == cancelWaitHandle) && (waitHandles.Length <= 64))
             {
-                success = WaitHandle.WaitAll(waitHandles, millisecondsTimeout, exitContext);
+                success = STPEventWaitHandle.WaitAll(waitHandles, millisecondsTimeout, exitContext);
             }
             else
             {
                 success = true;
                 int millisecondsLeft = millisecondsTimeout;
-                DateTime start = DateTime.Now;
+                Stopwatch stopwatch = Stopwatch.StartNew();
 
-                WaitHandle [] whs;
+                WaitHandle[] whs;
                 if (null != cancelWaitHandle)
                 {
-                    whs = new WaitHandle [] { null, cancelWaitHandle };
+                    whs = new WaitHandle[] { null, cancelWaitHandle };
                 }
                 else
                 {
-                    whs = new WaitHandle [] { null };
+                    whs = new WaitHandle[] { null };
                 }
 
                 bool waitInfinitely = (Timeout.Infinite == millisecondsTimeout);
@@ -450,7 +517,7 @@ namespace Amib.Threading.Internal
                 // We cannot use WaitHandle.WaitAll directly, because the cancelWaitHandle
                 // won't affect it.
                 // Each iteration we update the time left for the timeout.
-                for(int i = 0; i < workItemResults.Length; ++i)
+                for (int i = 0; i < waitableResults.Length; ++i)
                 {
                     // WaitAny don't work with negative numbers
                     if (!waitInfinitely && (millisecondsLeft < 0))
@@ -460,23 +527,22 @@ namespace Amib.Threading.Internal
                     }
 
                     whs[0] = waitHandles[i];
-                    int result = WaitHandle.WaitAny(whs, millisecondsLeft, exitContext);
-                    if((result > 0) || (WaitHandle.WaitTimeout == result))
+                    int result = STPEventWaitHandle.WaitAny(whs, millisecondsLeft, exitContext);
+                    if ((result > 0) || (STPEventWaitHandle.WaitTimeout == result))
                     {
                         success = false;
                         break;
                     }
 
-                    if(!waitInfinitely)
+                    if (!waitInfinitely)
                     {
                         // Update the time left to wait
-                        TimeSpan ts = DateTime.Now - start;
-                        millisecondsLeft = millisecondsTimeout - (int)ts.TotalMilliseconds;
+                        millisecondsLeft = millisecondsTimeout - (int)stopwatch.ElapsedMilliseconds;
                     }
                 }
             }
             // Release the wait handles
-            ReleaseWaitHandles(workItemResults);
+            ReleaseWaitHandles(waitableResults);
 
             return success;
         }
@@ -484,7 +550,7 @@ namespace Amib.Threading.Internal
         /// <summary>
         /// Waits for any of the work items in the specified array to complete, cancel, or timeout
         /// </summary>
-        /// <param name="workItemResults">Array of work item result objects</param>
+        /// <param name="waitableResults">Array of work item result objects</param>
         /// <param name="millisecondsTimeout">The number of milliseconds to wait, or Timeout.Infinite (-1) to wait indefinitely.</param>
         /// <param name="exitContext">
         /// true to exit the synchronization domain for the context before the wait (if in a synchronized context), and reacquire it; otherwise, false. 
@@ -493,38 +559,38 @@ namespace Amib.Threading.Internal
         /// <returns>
         /// The array index of the work item result that satisfied the wait, or WaitTimeout if no work item result satisfied the wait and a time interval equivalent to millisecondsTimeout has passed or the work item has been canceled.
         /// </returns>
-        internal static int WaitAny(            
-            IWorkItemResult [] workItemResults,
+        internal static int WaitAny(
+            IWaitableResult[] waitableResults,
             int millisecondsTimeout,
             bool exitContext,
             WaitHandle cancelWaitHandle)
         {
-            WaitHandle [] waitHandles = null;
+            WaitHandle[] waitHandles;
 
             if (null != cancelWaitHandle)
             {
-                waitHandles = new WaitHandle[workItemResults.Length+1];
-                GetWaitHandles(workItemResults, waitHandles);
-                waitHandles[workItemResults.Length] = cancelWaitHandle;
+                waitHandles = new WaitHandle[waitableResults.Length + 1];
+                GetWaitHandles(waitableResults, waitHandles);
+                waitHandles[waitableResults.Length] = cancelWaitHandle;
             }
             else
             {
-                waitHandles = new WaitHandle[workItemResults.Length];
-                GetWaitHandles(workItemResults, waitHandles);
+                waitHandles = new WaitHandle[waitableResults.Length];
+                GetWaitHandles(waitableResults, waitHandles);
             }
 
-            int result = WaitHandle.WaitAny(waitHandles, millisecondsTimeout, exitContext);
+            int result = STPEventWaitHandle.WaitAny(waitHandles, millisecondsTimeout, exitContext);
 
             // Treat cancel as timeout
             if (null != cancelWaitHandle)
             {
-                if (result == workItemResults.Length)
+                if (result == waitableResults.Length)
                 {
-                    result = WaitHandle.WaitTimeout;
+                    result = STPEventWaitHandle.WaitTimeout;
                 }
             }
 
-            ReleaseWaitHandles(workItemResults);
+            ReleaseWaitHandles(waitableResults);
 
             return result;
         }
@@ -532,16 +598,16 @@ namespace Amib.Threading.Internal
         /// <summary>
         /// Fill an array of wait handles with the work items wait handles.
         /// </summary>
-        /// <param name="workItemResults">An array of work item results</param>
+        /// <param name="waitableResults">An array of work item results</param>
         /// <param name="waitHandles">An array of wait handles to fill</param>
         private static void GetWaitHandles(
-            IWorkItemResult [] workItemResults,
-            WaitHandle [] waitHandles)
+            IWaitableResult[] waitableResults,
+            WaitHandle[] waitHandles)
         {
-            for(int i = 0; i < workItemResults.Length; ++i)
+            for (int i = 0; i < waitableResults.Length; ++i)
             {
-                WorkItemResult wir = workItemResults[i] as WorkItemResult;
-                Debug.Assert(null != wir, "All workItemResults must be WorkItemResult objects");
+                WorkItemResult wir = waitableResults[i].GetWorkItemResult() as WorkItemResult;
+                Debug.Assert(null != wir, "All waitableResults must be WorkItemResult objects");
 
                 waitHandles[i] = wir.GetWorkItem().GetWaitHandle();
             }
@@ -550,40 +616,64 @@ namespace Amib.Threading.Internal
         /// <summary>
         /// Release the work items' wait handles
         /// </summary>
-        /// <param name="workItemResults">An array of work item results</param>
-        private static void ReleaseWaitHandles(IWorkItemResult [] workItemResults)
+        /// <param name="waitableResults">An array of work item results</param>
+        private static void ReleaseWaitHandles(IWaitableResult[] waitableResults)
         {
-            for(int i = 0; i < workItemResults.Length; ++i)
+            for (int i = 0; i < waitableResults.Length; ++i)
             {
-                WorkItemResult wir = workItemResults[i] as WorkItemResult;
+                WorkItemResult wir = (WorkItemResult)waitableResults[i].GetWorkItemResult();
 
                 wir.GetWorkItem().ReleaseWaitHandle();
             }
         }
 
-
         #endregion
-        
+
         #region Private Members
 
         private WorkItemState GetWorkItemState()
         {
-            if (_canceledWorkItemsGroup.IsCanceled)
+            lock (this)
             {
-                return WorkItemState.Canceled;
-            }
-            return _workItemState;
+                if (WorkItemState.Completed == _workItemState)
+                {
+                    return _workItemState;
+                }
+
+                long nowTicks = DateTime.UtcNow.Ticks;
 
+                if (WorkItemState.Canceled != _workItemState && nowTicks > _expirationTime)
+                {
+                    _workItemState = WorkItemState.Canceled;
+                }
+
+                if (WorkItemState.InProgress == _workItemState)
+                {
+                    return _workItemState;
+                }
+
+                if (CanceledSmartThreadPool.IsCanceled || CanceledWorkItemsGroup.IsCanceled)
+                {
+                    return WorkItemState.Canceled;
+                }
+
+                return _workItemState;
+            }
         }
+
+
         /// <summary>
         /// Sets the work item's state
         /// </summary>
         /// <param name="workItemState">The state to set the work item to</param>
         private void SetWorkItemState(WorkItemState workItemState)
         {
-            lock(this)
+            lock (this)
             {
-                _workItemState = workItemState;
+                if (IsValidStatesTransition(_workItemState, workItemState))
+                {
+                    _workItemState = workItemState;
+                }
             }
         }
 
@@ -594,7 +684,7 @@ namespace Amib.Threading.Internal
         private void SignalComplete(bool canceled)
         {
             SetWorkItemState(canceled ? WorkItemState.Canceled : WorkItemState.Completed);
-            lock(this)
+            lock (this)
             {
                 // If someone is waiting then signal.
                 if (null != _workItemCompleted)
@@ -606,40 +696,93 @@ namespace Amib.Threading.Internal
 
         internal void WorkItemIsQueued()
         {
-            _queuedTime = DateTime.Now;
+            _waitingOnQueueStopwatch.Start();
         }
 
         #endregion
-        
+
         #region Members exposed by WorkItemResult
 
         /// <summary>
         /// Cancel the work item if it didn't start running yet.
         /// </summary>
         /// <returns>Returns true on success or false if the work item is in progress or already completed</returns>
-        private bool Cancel()
+        private bool Cancel(bool abortExecution)
         {
-            lock(this)
+#if (_WINDOWS_CE)
+            if(abortExecution)
+            {
+                throw new ArgumentOutOfRangeException("abortExecution", "WindowsCE doesn't support this feature");
+            }
+#endif
+            bool success = false;
+            bool signalComplete = false;
+
+            lock (this)
             {
-                switch(GetWorkItemState())
+                switch (GetWorkItemState())
                 {
                     case WorkItemState.Canceled:
                         //Debug.WriteLine("Work item already canceled");
-                        return true;
+                        if (abortExecution)
+                        {
+                            Thread executionThread = Interlocked.CompareExchange(ref _executingThread, null, _executingThread);
+                            if (null != executionThread)
+                            {
+                                executionThread.Abort(); // "Cancel"
+                                // No need to signalComplete, because we already cancelled this work item
+                                // so it already signaled its completion.
+                                //signalComplete = true;
+                            }
+                        } 
+                        success = true;
+                        break;
                     case WorkItemState.Completed:
-                    case WorkItemState.InProgress:
                         //Debug.WriteLine("Work item cannot be canceled");
-                        return false;
+                        break;
+                    case WorkItemState.InProgress:
+                        if (abortExecution)
+                        {
+                            Thread executionThread = Interlocked.CompareExchange(ref _executingThread, null, _executingThread);
+                            if (null != executionThread)
+                            {
+                                executionThread.Abort(); // "Cancel"
+                                success = true;
+                                signalComplete = true;
+                            }
+                        }
+                        else
+                        {
+                            // **************************
+                            // Stock SmartThreadPool 2.2.3 sets these to true and relies on the thread to check the
+                            // WorkItem cancellation status.  However, OpenSimulator uses a different mechanism to notify
+                            // scripts of co-operative termination and the abort code also relies on this method
+                            // returning false in order to implement a small wait.
+                            //
+                            // Therefore, as was the case previously with STP, we will not signal successful cancellation
+                            // here.  It's possible that OpenSimulator code could be changed in the future to remove
+                            // the need for this change.
+                            // **************************
+                            success = false;
+                            signalComplete = false;
+                        }
+                        break;
                     case WorkItemState.InQueue:
                         // Signal to the wait for completion that the work
                         // item has been completed (canceled). There is no
                         // reason to wait for it to get out of the queue
-                        SignalComplete(true);
+                        signalComplete = true;
                         //Debug.WriteLine("Work item canceled");
-                        return true;
+                        success = true;
+                        break;
+                }
+
+                if (signalComplete)
+                {
+                    SignalComplete(true);
                 }
             }
-            return false;
+            return success;
         }
 
         /// <summary>
@@ -653,7 +796,7 @@ namespace Amib.Threading.Internal
             bool exitContext,
             WaitHandle cancelWaitHandle)
         {
-            Exception e = null;
+            Exception e;
             object result = GetResult(millisecondsTimeout, exitContext, cancelWaitHandle, out e);
             if (null != e)
             {
@@ -694,7 +837,7 @@ namespace Amib.Threading.Internal
             {
                 WaitHandle wh = GetWaitHandle();
 
-                bool timeout = !wh.WaitOne(millisecondsTimeout, exitContext);
+                bool timeout = !STPEventWaitHandle.WaitOne(wh, millisecondsTimeout, exitContext);
 
                 ReleaseWaitHandle();
 
@@ -706,10 +849,10 @@ namespace Amib.Threading.Internal
             else
             {
                 WaitHandle wh = GetWaitHandle();
-                int result = WaitHandle.WaitAny(new WaitHandle[] { wh, cancelWaitHandle });
+                int result = STPEventWaitHandle.WaitAny(new WaitHandle[] { wh, cancelWaitHandle });
                 ReleaseWaitHandle();
 
-                switch(result)
+                switch (result)
                 {
                     case 0:
                         // The work item signaled
@@ -717,7 +860,7 @@ namespace Amib.Threading.Internal
                         // work item (not the get result)
                         break;
                     case 1:
-                    case WaitHandle.WaitTimeout:
+                    case STPEventWaitHandle.WaitTimeout:
                         throw new WorkItemTimeoutException("Work item timeout");
                     default:
                         Debug.Assert(false);
@@ -745,11 +888,11 @@ namespace Amib.Threading.Internal
         /// </summary>
         private WaitHandle GetWaitHandle()
         {
-            lock(this)
+            lock (this)
             {
                 if (null == _workItemCompleted)
                 {
-                    _workItemCompleted = new ManualResetEvent(IsCompleted);
+                    _workItemCompleted = EventWaitHandleFactory.CreateManualResetEvent(IsCompleted);
                 }
                 ++_workItemCompletedRefCount;
             }
@@ -758,7 +901,7 @@ namespace Amib.Threading.Internal
 
         private void ReleaseWaitHandle()
         {
-            lock(this)
+            lock (this)
             {
                 if (null != _workItemCompleted)
                 {
@@ -779,10 +922,10 @@ namespace Amib.Threading.Internal
         {
             get
             {
-                lock(this)
+                lock (this)
                 {
                     WorkItemState workItemState = GetWorkItemState();
-                    return ((workItemState == WorkItemState.Completed) || 
+                    return ((workItemState == WorkItemState.Completed) ||
                             (workItemState == WorkItemState.Canceled));
                 }
             }
@@ -795,7 +938,7 @@ namespace Amib.Threading.Internal
         {
             get
             {
-                lock(this)
+                lock (this)
                 {
                     return (GetWorkItemState() == WorkItemState.Canceled);
                 }
@@ -843,172 +986,6 @@ namespace Amib.Threading.Internal
             }
         }
 
-
-        #region WorkItemResult class
-
-        private class WorkItemResult : IWorkItemResult, IInternalWorkItemResult
-        {
-            /// <summary>
-            /// A back reference to the work item
-            /// </summary>
-            private WorkItem _workItem;
-
-            public WorkItemResult(WorkItem workItem)
-            {
-                _workItem = workItem;
-            }
-
-            internal WorkItem GetWorkItem()
-            {
-                return _workItem;
-            }
-
-            #region IWorkItemResult Members
-
-            public bool IsCompleted
-            {
-                get
-                {
-                    return _workItem.IsCompleted;
-                }
-            }
-
-            public void Abort()
-            {
-                _workItem.Abort();
-            }
-
-            public bool IsCanceled
-            {
-                get
-                {
-                    return _workItem.IsCanceled;
-                }
-            }
-
-            public object GetResult()
-            {
-                return _workItem.GetResult(Timeout.Infinite, true, null);
-            }
-    
-            public object GetResult(int millisecondsTimeout, bool exitContext)
-            {
-                return _workItem.GetResult(millisecondsTimeout, exitContext, null);
-            }
-
-            public object GetResult(TimeSpan timeout, bool exitContext)
-            {
-                return _workItem.GetResult((int)timeout.TotalMilliseconds, exitContext, null);
-            }
-
-            public object GetResult(int millisecondsTimeout, bool exitContext, WaitHandle cancelWaitHandle)
-            {
-                return _workItem.GetResult(millisecondsTimeout, exitContext, cancelWaitHandle);
-            }
-
-            public object GetResult(TimeSpan timeout, bool exitContext, WaitHandle cancelWaitHandle)
-            {
-                return _workItem.GetResult((int)timeout.TotalMilliseconds, exitContext, cancelWaitHandle);
-            }
-
-            public object GetResult(out Exception e)
-            {
-                return _workItem.GetResult(Timeout.Infinite, true, null, out e);
-            }
-    
-            public object GetResult(int millisecondsTimeout, bool exitContext, out Exception e)
-            {
-                return _workItem.GetResult(millisecondsTimeout, exitContext, null, out e);
-            }
-
-            public object GetResult(TimeSpan timeout, bool exitContext, out Exception e)
-            {
-                return _workItem.GetResult((int)timeout.TotalMilliseconds, exitContext, null, out e);
-            }
-
-            public object GetResult(int millisecondsTimeout, bool exitContext, WaitHandle cancelWaitHandle, out Exception e)
-            {
-                return _workItem.GetResult(millisecondsTimeout, exitContext, cancelWaitHandle, out e);
-            }
-
-            public object GetResult(TimeSpan timeout, bool exitContext, WaitHandle cancelWaitHandle, out Exception e)
-            {
-                return _workItem.GetResult((int)timeout.TotalMilliseconds, exitContext, cancelWaitHandle, out e);
-            }
-
-            public bool Cancel()
-            {
-                return _workItem.Cancel();
-            }
-
-            public object State
-            {
-                get
-                {
-                    return _workItem._state;
-                }
-            }
-
-            public WorkItemPriority WorkItemPriority 
-            { 
-                get
-                {
-                    return _workItem._workItemInfo.WorkItemPriority;
-                }
-            }
-
-            /// <summary>
-            /// Return the result, same as GetResult()
-            /// </summary>
-            public object Result
-            {
-                get { return GetResult(); }
-            }
-
-            /// <summary>
-            /// Returns the exception if occured otherwise returns null.
-            /// This value is valid only after the work item completed,
-            /// before that it is always null.
-            /// </summary>
-            public object Exception
-            {
-                get { return _workItem._exception; }
-            }
-
-            #endregion
-
-            #region IInternalWorkItemResult Members
-
-            public event WorkItemStateCallback OnWorkItemStarted
-            {
-                add
-                {
-                    _workItem.OnWorkItemStarted += value;
-                }
-                remove
-                {
-                    _workItem.OnWorkItemStarted -= value;
-                }
-            }
-
-
-            public event WorkItemStateCallback OnWorkItemCompleted
-            {
-                add
-                {
-                    _workItem.OnWorkItemCompleted += value;
-                }
-                remove
-                {
-                    _workItem.OnWorkItemCompleted -= value;
-                }
-            }
-
-            #endregion
-        }
-
-        #endregion
-
         public void DisposeOfState()
         {
             if (_workItemInfo.DisposeOfStateObjects)
@@ -1021,15 +998,5 @@ namespace Amib.Threading.Internal
                 }
             }
         }
-
-        public void Abort()
-        {
-            lock (this)
-            {
-                if(currentThread != null)
-                    currentThread.Abort();
-            }
-        }
     }
-    #endregion
 }
diff --git a/ThirdParty/SmartThreadPool/WorkItemFactory.cs b/ThirdParty/SmartThreadPool/WorkItemFactory.cs
index dfcb54f..16ccd81 100644
--- a/ThirdParty/SmartThreadPool/WorkItemFactory.cs
+++ b/ThirdParty/SmartThreadPool/WorkItemFactory.cs
@@ -1,148 +1,152 @@
-// Ami Bar
-// amibar@gmail.com
-
 using System;
 
 namespace Amib.Threading.Internal
 {
-    #region WorkItemFactory class 
-
-    public class WorkItemFactory
-    {
-        /// <summary>
-        /// Create a new work item
-        /// </summary>
+        #region WorkItemFactory class 
+
+        public class WorkItemFactory
+        {
+                /// <summary>
+                /// Create a new work item
+                /// </summary>
+                /// <param name="workItemsGroup">The WorkItemsGroup of this workitem</param>
+                /// <param name="wigStartInfo">Work item group start information</param>
+                /// <param name="callback">A callback to execute</param>
+                /// <returns>Returns a work item</returns>
+                public static WorkItem CreateWorkItem(
+                        IWorkItemsGroup workItemsGroup,
+                        WIGStartInfo wigStartInfo,
+                        WorkItemCallback callback)
+                {
+                        return CreateWorkItem(workItemsGroup, wigStartInfo, callback, null);
+                }
+
+                /// <summary>
+                /// Create a new work item
+                /// </summary>
+        /// <param name="workItemsGroup">The WorkItemsGroup of this workitem</param>
         /// <param name="wigStartInfo">Work item group start information</param>
-        /// <param name="callback">A callback to execute</param>
-        /// <returns>Returns a work item</returns>
-        public static WorkItem CreateWorkItem(
-            IWorkItemsGroup workItemsGroup,
-            WIGStartInfo wigStartInfo,
-            WorkItemCallback callback)
-        {
-            return CreateWorkItem(workItemsGroup, wigStartInfo, callback, null);
-        }
-
-        /// <summary>
-        /// Create a new work item
-        /// </summary>
-        /// <param name="wigStartInfo">Work item group start information</param>
-        /// <param name="callback">A callback to execute</param>
-        /// <param name="workItemPriority">The priority of the work item</param>
-        /// <returns>Returns a work item</returns>
-        public static WorkItem CreateWorkItem(
-            IWorkItemsGroup workItemsGroup,
-            WIGStartInfo wigStartInfo,
-            WorkItemCallback callback, 
-            WorkItemPriority workItemPriority)
-        {
-            return CreateWorkItem(workItemsGroup, wigStartInfo, callback, null, workItemPriority);
-        }
-
-        /// <summary>
-        /// Create a new work item
-        /// </summary>
+                /// <param name="callback">A callback to execute</param>
+                /// <param name="workItemPriority">The priority of the work item</param>
+                /// <returns>Returns a work item</returns>
+                public static WorkItem CreateWorkItem(
+                        IWorkItemsGroup workItemsGroup,
+                        WIGStartInfo wigStartInfo,
+                        WorkItemCallback callback, 
+                        WorkItemPriority workItemPriority)
+                {
+                        return CreateWorkItem(workItemsGroup, wigStartInfo, callback, null, workItemPriority);
+                }
+
+                /// <summary>
+                /// Create a new work item
+                /// </summary>
+        /// <param name="workItemsGroup">The WorkItemsGroup of this workitem</param>
         /// <param name="wigStartInfo">Work item group start information</param>
-        /// <param name="workItemInfo">Work item info</param>
-        /// <param name="callback">A callback to execute</param>
-        /// <returns>Returns a work item</returns>
-        public static WorkItem CreateWorkItem(
-            IWorkItemsGroup workItemsGroup,
-            WIGStartInfo wigStartInfo,
-            WorkItemInfo workItemInfo, 
-            WorkItemCallback callback)
-        {
-            return CreateWorkItem(
-                workItemsGroup,
-                wigStartInfo,
-                workItemInfo, 
-                callback, 
-                null);
-        }
-
-        /// <summary>
-        /// Create a new work item
-        /// </summary>
+                /// <param name="workItemInfo">Work item info</param>
+                /// <param name="callback">A callback to execute</param>
+                /// <returns>Returns a work item</returns>
+                public static WorkItem CreateWorkItem(
+                        IWorkItemsGroup workItemsGroup,
+                        WIGStartInfo wigStartInfo,
+                        WorkItemInfo workItemInfo, 
+                        WorkItemCallback callback)
+                {
+                        return CreateWorkItem(
+                                workItemsGroup,
+                                wigStartInfo,
+                                workItemInfo, 
+                                callback, 
+                                null);
+                }
+
+                /// <summary>
+                /// Create a new work item
+                /// </summary>
+        /// <param name="workItemsGroup">The WorkItemsGroup of this workitem</param>
         /// <param name="wigStartInfo">Work item group start information</param>
-        /// <param name="callback">A callback to execute</param>
-        /// <param name="state">
-        /// The context object of the work item. Used for passing arguments to the work item. 
-        /// </param>
-        /// <returns>Returns a work item</returns>
-        public static WorkItem CreateWorkItem(
-            IWorkItemsGroup workItemsGroup,
-            WIGStartInfo wigStartInfo,
-            WorkItemCallback callback, 
-            object state)
-        {
-            ValidateCallback(callback);
-
-            WorkItemInfo workItemInfo = new WorkItemInfo();
-            workItemInfo.UseCallerCallContext = wigStartInfo.UseCallerCallContext;
-            workItemInfo.UseCallerHttpContext = wigStartInfo.UseCallerHttpContext;
-            workItemInfo.PostExecuteWorkItemCallback = wigStartInfo.PostExecuteWorkItemCallback;
-            workItemInfo.CallToPostExecute = wigStartInfo.CallToPostExecute;
-            workItemInfo.DisposeOfStateObjects = wigStartInfo.DisposeOfStateObjects;
-
-            WorkItem workItem = new WorkItem(
-                workItemsGroup,
-                workItemInfo,
-                callback, 
-                state);
-            return workItem;
-        }
-
-        /// <summary>
-        /// Create a new work item
-        /// </summary>
-        /// <param name="wigStartInfo">Work item group start information</param>
-        /// <param name="callback">A callback to execute</param>
-        /// <param name="state">
-        /// The context object of the work item. Used for passing arguments to the work item. 
-        /// </param>
-        /// <param name="workItemPriority">The work item priority</param>
-        /// <returns>Returns a work item</returns>
-        public static WorkItem CreateWorkItem(
-            IWorkItemsGroup workItemsGroup,
-            WIGStartInfo wigStartInfo,
-            WorkItemCallback callback, 
-            object state, 
-            WorkItemPriority workItemPriority)
-        {
-            ValidateCallback(callback);
-
-            WorkItemInfo workItemInfo = new WorkItemInfo();
-            workItemInfo.UseCallerCallContext = wigStartInfo.UseCallerCallContext;
-            workItemInfo.UseCallerHttpContext = wigStartInfo.UseCallerHttpContext;
-            workItemInfo.PostExecuteWorkItemCallback = wigStartInfo.PostExecuteWorkItemCallback;
-            workItemInfo.CallToPostExecute = wigStartInfo.CallToPostExecute;
-            workItemInfo.DisposeOfStateObjects = wigStartInfo.DisposeOfStateObjects;
-            workItemInfo.WorkItemPriority = workItemPriority;
-
-            WorkItem workItem = new WorkItem(
-                workItemsGroup,
-                workItemInfo,
-                callback, 
-                state);
-
-            return workItem;
-        }
-
-        /// <summary>
-        /// Create a new work item
-        /// </summary>
-        /// <param name="wigStartInfo">Work item group start information</param>
-        /// <param name="workItemInfo">Work item information</param>
-        /// <param name="callback">A callback to execute</param>
-        /// <param name="state">
-        /// The context object of the work item. Used for passing arguments to the work item. 
-        /// </param>
-        /// <returns>Returns a work item</returns>
+                /// <param name="callback">A callback to execute</param>
+                /// <param name="state">
+                /// The context object of the work item. Used for passing arguments to the work item. 
+                /// </param>
+                /// <returns>Returns a work item</returns>
+                public static WorkItem CreateWorkItem(
+                        IWorkItemsGroup workItemsGroup,
+                        WIGStartInfo wigStartInfo,
+                        WorkItemCallback callback, 
+                        object state)
+                {
+                        ValidateCallback(callback);
+            
+                        WorkItemInfo workItemInfo = new WorkItemInfo();
+                        workItemInfo.UseCallerCallContext = wigStartInfo.UseCallerCallContext;
+                        workItemInfo.UseCallerHttpContext = wigStartInfo.UseCallerHttpContext;
+                        workItemInfo.PostExecuteWorkItemCallback = wigStartInfo.PostExecuteWorkItemCallback;
+                        workItemInfo.CallToPostExecute = wigStartInfo.CallToPostExecute;
+                        workItemInfo.DisposeOfStateObjects = wigStartInfo.DisposeOfStateObjects;
+            workItemInfo.WorkItemPriority = wigStartInfo.WorkItemPriority;
+
+                        WorkItem workItem = new WorkItem(
+                                workItemsGroup,
+                                workItemInfo,
+                                callback, 
+                                state);
+                        return workItem;
+                }
+
+                /// <summary>
+                /// Create a new work item
+                /// </summary>
+                /// <param name="workItemsGroup">The work items group</param>
+                /// <param name="wigStartInfo">Work item group start information</param>
+                /// <param name="callback">A callback to execute</param>
+                /// <param name="state">
+                /// The context object of the work item. Used for passing arguments to the work item. 
+                /// </param>
+                /// <param name="workItemPriority">The work item priority</param>
+                /// <returns>Returns a work item</returns>
+                public static WorkItem CreateWorkItem(
+                        IWorkItemsGroup workItemsGroup,
+                        WIGStartInfo wigStartInfo,
+                        WorkItemCallback callback, 
+                        object state, 
+                        WorkItemPriority workItemPriority)
+                {
+                        ValidateCallback(callback);
+
+                        WorkItemInfo workItemInfo = new WorkItemInfo();
+                        workItemInfo.UseCallerCallContext = wigStartInfo.UseCallerCallContext;
+                        workItemInfo.UseCallerHttpContext = wigStartInfo.UseCallerHttpContext;
+                        workItemInfo.PostExecuteWorkItemCallback = wigStartInfo.PostExecuteWorkItemCallback;
+                        workItemInfo.CallToPostExecute = wigStartInfo.CallToPostExecute;
+                        workItemInfo.DisposeOfStateObjects = wigStartInfo.DisposeOfStateObjects;
+                        workItemInfo.WorkItemPriority = workItemPriority;
+
+                        WorkItem workItem = new WorkItem(
+                                workItemsGroup,
+                                workItemInfo,
+                                callback, 
+                                state);
+
+                        return workItem;
+                }
+
+                /// <summary>
+                /// Create a new work item
+                /// </summary>
+        /// <param name="workItemsGroup">The work items group</param>
+                /// <param name="wigStartInfo">Work item group start information</param>
+                /// <param name="workItemInfo">Work item information</param>
+                /// <param name="callback">A callback to execute</param>
+                /// <param name="state">
+                /// The context object of the work item. Used for passing arguments to the work item. 
+                /// </param>
+                /// <returns>Returns a work item</returns>
         public static WorkItem CreateWorkItem(
             IWorkItemsGroup workItemsGroup,
             WIGStartInfo wigStartInfo,
-            WorkItemInfo workItemInfo, 
-            WorkItemCallback callback, 
+            WorkItemInfo workItemInfo,
+            WorkItemCallback callback,
             object state)
         {
             ValidateCallback(callback);
@@ -151,183 +155,189 @@ namespace Amib.Threading.Internal
             WorkItem workItem = new WorkItem(
                 workItemsGroup,
                 new WorkItemInfo(workItemInfo),
-                callback, 
+                callback,
                 state);
 
             return workItem;
         }
 
-        /// <summary>
-        /// Create a new work item
-        /// </summary>
-        /// <param name="wigStartInfo">Work item group start information</param>
-        /// <param name="callback">A callback to execute</param>
-        /// <param name="state">
-        /// The context object of the work item. Used for passing arguments to the work item. 
-        /// </param>
-        /// <param name="postExecuteWorkItemCallback">
-        /// A delegate to call after the callback completion
-        /// </param>
-        /// <returns>Returns a work item</returns>
-        public static WorkItem CreateWorkItem(
-            IWorkItemsGroup workItemsGroup,
-            WIGStartInfo wigStartInfo,
-            WorkItemCallback callback, 
-            object state,
-            PostExecuteWorkItemCallback postExecuteWorkItemCallback)
-        {
-            ValidateCallback(callback);
-            ValidateCallback(postExecuteWorkItemCallback);
-
-            WorkItemInfo workItemInfo = new WorkItemInfo();
-            workItemInfo.UseCallerCallContext = wigStartInfo.UseCallerCallContext;
-            workItemInfo.UseCallerHttpContext = wigStartInfo.UseCallerHttpContext;
-            workItemInfo.PostExecuteWorkItemCallback = postExecuteWorkItemCallback;
-            workItemInfo.CallToPostExecute = wigStartInfo.CallToPostExecute;
-            workItemInfo.DisposeOfStateObjects = wigStartInfo.DisposeOfStateObjects;
-
-            WorkItem workItem = new WorkItem(
-                workItemsGroup,
-                workItemInfo,
-                callback, 
-                state);
-
-            return workItem;
-        }
-
-        /// <summary>
-        /// Create a new work item
-        /// </summary>
-        /// <param name="wigStartInfo">Work item group start information</param>
-        /// <param name="callback">A callback to execute</param>
-        /// <param name="state">
-        /// The context object of the work item. Used for passing arguments to the work item. 
-        /// </param>
-        /// <param name="postExecuteWorkItemCallback">
-        /// A delegate to call after the callback completion
-        /// </param>
-        /// <param name="workItemPriority">The work item priority</param>
-        /// <returns>Returns a work item</returns>
-        public static WorkItem CreateWorkItem(
-            IWorkItemsGroup workItemsGroup,
-            WIGStartInfo wigStartInfo,
-            WorkItemCallback callback, 
-            object state,
-            PostExecuteWorkItemCallback postExecuteWorkItemCallback,
-            WorkItemPriority workItemPriority)
-        {
-            ValidateCallback(callback);
-            ValidateCallback(postExecuteWorkItemCallback);
-
-            WorkItemInfo workItemInfo = new WorkItemInfo();
-            workItemInfo.UseCallerCallContext = wigStartInfo.UseCallerCallContext;
-            workItemInfo.UseCallerHttpContext = wigStartInfo.UseCallerHttpContext;
-            workItemInfo.PostExecuteWorkItemCallback = postExecuteWorkItemCallback;
-            workItemInfo.CallToPostExecute = wigStartInfo.CallToPostExecute;
-            workItemInfo.DisposeOfStateObjects = wigStartInfo.DisposeOfStateObjects;
-            workItemInfo.WorkItemPriority = workItemPriority;
-
-            WorkItem workItem = new WorkItem(
-                workItemsGroup,
-                workItemInfo,
-                callback, 
-                state);
-
-            return workItem;
-        }
-
-        /// <summary>
-        /// Create a new work item
-        /// </summary>
-        /// <param name="wigStartInfo">Work item group start information</param>
-        /// <param name="callback">A callback to execute</param>
-        /// <param name="state">
-        /// The context object of the work item. Used for passing arguments to the work item. 
-        /// </param>
-        /// <param name="postExecuteWorkItemCallback">
-        /// A delegate to call after the callback completion
-        /// </param>
-        /// <param name="callToPostExecute">Indicates on which cases to call to the post execute callback</param>
-        /// <returns>Returns a work item</returns>
-        public static WorkItem CreateWorkItem(
-            IWorkItemsGroup workItemsGroup,
-            WIGStartInfo wigStartInfo,
-            WorkItemCallback callback, 
-            object state,
-            PostExecuteWorkItemCallback postExecuteWorkItemCallback,
-            CallToPostExecute callToPostExecute)
-        {
-            ValidateCallback(callback);
-            ValidateCallback(postExecuteWorkItemCallback);
-
-            WorkItemInfo workItemInfo = new WorkItemInfo();
-            workItemInfo.UseCallerCallContext = wigStartInfo.UseCallerCallContext;
-            workItemInfo.UseCallerHttpContext = wigStartInfo.UseCallerHttpContext;
-            workItemInfo.PostExecuteWorkItemCallback = postExecuteWorkItemCallback;
-            workItemInfo.CallToPostExecute = callToPostExecute;
-            workItemInfo.DisposeOfStateObjects = wigStartInfo.DisposeOfStateObjects;
-
-            WorkItem workItem = new WorkItem(
-                workItemsGroup,
-                workItemInfo,
-                callback, 
-                state);
-
-            return workItem;
-        }
-
-        /// <summary>
-        /// Create a new work item
-        /// </summary>
-        /// <param name="wigStartInfo">Work item group start information</param>
-        /// <param name="callback">A callback to execute</param>
-        /// <param name="state">
-        /// The context object of the work item. Used for passing arguments to the work item. 
-        /// </param>
-        /// <param name="postExecuteWorkItemCallback">
-        /// A delegate to call after the callback completion
-        /// </param>
-        /// <param name="callToPostExecute">Indicates on which cases to call to the post execute callback</param>
-        /// <param name="workItemPriority">The work item priority</param>
-        /// <returns>Returns a work item</returns>
-        public static WorkItem CreateWorkItem(
-            IWorkItemsGroup workItemsGroup,
-            WIGStartInfo wigStartInfo,
-            WorkItemCallback callback, 
-            object state,
-            PostExecuteWorkItemCallback postExecuteWorkItemCallback,
-            CallToPostExecute callToPostExecute,
-            WorkItemPriority workItemPriority)
-        {
-
-            ValidateCallback(callback);
-            ValidateCallback(postExecuteWorkItemCallback);
-
-            WorkItemInfo workItemInfo = new WorkItemInfo();
-            workItemInfo.UseCallerCallContext = wigStartInfo.UseCallerCallContext;
-            workItemInfo.UseCallerHttpContext = wigStartInfo.UseCallerHttpContext;
-            workItemInfo.PostExecuteWorkItemCallback = postExecuteWorkItemCallback;
-            workItemInfo.CallToPostExecute = callToPostExecute;
-            workItemInfo.WorkItemPriority = workItemPriority;
-            workItemInfo.DisposeOfStateObjects = wigStartInfo.DisposeOfStateObjects;
-
-            WorkItem workItem = new WorkItem(
-                workItemsGroup,
-                workItemInfo,
-                callback, 
-                state);
-            
-            return workItem;
-        }
-
-        private static void ValidateCallback(Delegate callback)
-        {
-            if(callback.GetInvocationList().Length > 1)
-            {
-                throw new NotSupportedException("SmartThreadPool doesn't support delegates chains");
-            }
-        }
-    }
-
-    #endregion
+                /// <summary>
+                /// Create a new work item
+                /// </summary>
+        /// <param name="workItemsGroup">The work items group</param>
+                /// <param name="wigStartInfo">Work item group start information</param>
+                /// <param name="callback">A callback to execute</param>
+                /// <param name="state">
+                /// The context object of the work item. Used for passing arguments to the work item. 
+                /// </param>
+                /// <param name="postExecuteWorkItemCallback">
+                /// A delegate to call after the callback completion
+                /// </param>
+                /// <returns>Returns a work item</returns>
+                public static WorkItem CreateWorkItem(
+                        IWorkItemsGroup workItemsGroup,
+                        WIGStartInfo wigStartInfo,
+                        WorkItemCallback callback, 
+                        object state,
+                        PostExecuteWorkItemCallback postExecuteWorkItemCallback)
+                {
+                        ValidateCallback(callback);
+                        ValidateCallback(postExecuteWorkItemCallback);
+
+                        WorkItemInfo workItemInfo = new WorkItemInfo();
+                        workItemInfo.UseCallerCallContext = wigStartInfo.UseCallerCallContext;
+                        workItemInfo.UseCallerHttpContext = wigStartInfo.UseCallerHttpContext;
+                        workItemInfo.PostExecuteWorkItemCallback = postExecuteWorkItemCallback;
+                        workItemInfo.CallToPostExecute = wigStartInfo.CallToPostExecute;
+                        workItemInfo.DisposeOfStateObjects = wigStartInfo.DisposeOfStateObjects;
+            workItemInfo.WorkItemPriority = wigStartInfo.WorkItemPriority;
+
+                        WorkItem workItem = new WorkItem(
+                                workItemsGroup,
+                                workItemInfo,
+                                callback, 
+                                state);
+
+                        return workItem;
+                }
+
+                /// <summary>
+                /// Create a new work item
+                /// </summary>
+        /// <param name="workItemsGroup">The work items group</param>
+                /// <param name="wigStartInfo">Work item group start information</param>
+                /// <param name="callback">A callback to execute</param>
+                /// <param name="state">
+                /// The context object of the work item. Used for passing arguments to the work item. 
+                /// </param>
+                /// <param name="postExecuteWorkItemCallback">
+                /// A delegate to call after the callback completion
+                /// </param>
+                /// <param name="workItemPriority">The work item priority</param>
+                /// <returns>Returns a work item</returns>
+                public static WorkItem CreateWorkItem(
+                        IWorkItemsGroup workItemsGroup,
+                        WIGStartInfo wigStartInfo,
+                        WorkItemCallback callback, 
+                        object state,
+                        PostExecuteWorkItemCallback postExecuteWorkItemCallback,
+                        WorkItemPriority workItemPriority)
+                {
+                        ValidateCallback(callback);
+                        ValidateCallback(postExecuteWorkItemCallback);
+
+                        WorkItemInfo workItemInfo = new WorkItemInfo();
+                        workItemInfo.UseCallerCallContext = wigStartInfo.UseCallerCallContext;
+                        workItemInfo.UseCallerHttpContext = wigStartInfo.UseCallerHttpContext;
+                        workItemInfo.PostExecuteWorkItemCallback = postExecuteWorkItemCallback;
+                        workItemInfo.CallToPostExecute = wigStartInfo.CallToPostExecute;
+                        workItemInfo.DisposeOfStateObjects = wigStartInfo.DisposeOfStateObjects;
+                        workItemInfo.WorkItemPriority = workItemPriority;
+
+                        WorkItem workItem = new WorkItem(
+                                workItemsGroup,
+                                workItemInfo,
+                                callback, 
+                                state);
+
+                        return workItem;
+                }
+
+                /// <summary>
+                /// Create a new work item
+                /// </summary>
+        /// <param name="workItemsGroup">The work items group</param>
+                /// <param name="wigStartInfo">Work item group start information</param>
+                /// <param name="callback">A callback to execute</param>
+                /// <param name="state">
+                /// The context object of the work item. Used for passing arguments to the work item. 
+                /// </param>
+                /// <param name="postExecuteWorkItemCallback">
+                /// A delegate to call after the callback completion
+                /// </param>
+                /// <param name="callToPostExecute">Indicates on which cases to call to the post execute callback</param>
+                /// <returns>Returns a work item</returns>
+                public static WorkItem CreateWorkItem(
+                        IWorkItemsGroup workItemsGroup,
+                        WIGStartInfo wigStartInfo,
+                        WorkItemCallback callback, 
+                        object state,
+                        PostExecuteWorkItemCallback postExecuteWorkItemCallback,
+                        CallToPostExecute callToPostExecute)
+                {
+                        ValidateCallback(callback);
+                        ValidateCallback(postExecuteWorkItemCallback);
+
+                        WorkItemInfo workItemInfo = new WorkItemInfo();
+                        workItemInfo.UseCallerCallContext = wigStartInfo.UseCallerCallContext;
+                        workItemInfo.UseCallerHttpContext = wigStartInfo.UseCallerHttpContext;
+                        workItemInfo.PostExecuteWorkItemCallback = postExecuteWorkItemCallback;
+                        workItemInfo.CallToPostExecute = callToPostExecute;
+                        workItemInfo.DisposeOfStateObjects = wigStartInfo.DisposeOfStateObjects;
+            workItemInfo.WorkItemPriority = wigStartInfo.WorkItemPriority;
+
+                        WorkItem workItem = new WorkItem(
+                                workItemsGroup,
+                                workItemInfo,
+                                callback, 
+                                state);
+
+                        return workItem;
+                }
+
+                /// <summary>
+                /// Create a new work item
+                /// </summary>
+        /// <param name="workItemsGroup">The work items group</param>
+                /// <param name="wigStartInfo">Work item group start information</param>
+                /// <param name="callback">A callback to execute</param>
+                /// <param name="state">
+                /// The context object of the work item. Used for passing arguments to the work item. 
+                /// </param>
+                /// <param name="postExecuteWorkItemCallback">
+                /// A delegate to call after the callback completion
+                /// </param>
+                /// <param name="callToPostExecute">Indicates on which cases to call to the post execute callback</param>
+                /// <param name="workItemPriority">The work item priority</param>
+                /// <returns>Returns a work item</returns>
+                public static WorkItem CreateWorkItem(
+                        IWorkItemsGroup workItemsGroup,
+                        WIGStartInfo wigStartInfo,
+                        WorkItemCallback callback, 
+                        object state,
+                        PostExecuteWorkItemCallback postExecuteWorkItemCallback,
+                        CallToPostExecute callToPostExecute,
+                        WorkItemPriority workItemPriority)
+                {
+
+                        ValidateCallback(callback);
+                        ValidateCallback(postExecuteWorkItemCallback);
+
+                        WorkItemInfo workItemInfo = new WorkItemInfo();
+                        workItemInfo.UseCallerCallContext = wigStartInfo.UseCallerCallContext;
+                        workItemInfo.UseCallerHttpContext = wigStartInfo.UseCallerHttpContext;
+                        workItemInfo.PostExecuteWorkItemCallback = postExecuteWorkItemCallback;
+                        workItemInfo.CallToPostExecute = callToPostExecute;
+                        workItemInfo.WorkItemPriority = workItemPriority;
+                        workItemInfo.DisposeOfStateObjects = wigStartInfo.DisposeOfStateObjects;
+
+                        WorkItem workItem = new WorkItem(
+                                workItemsGroup,
+                                workItemInfo,
+                                callback, 
+                                state);
+                        
+                        return workItem;
+                }
+
+                private static void ValidateCallback(Delegate callback)
+                {
+            if (callback != null && callback.GetInvocationList().Length > 1)
+                        {
+                                throw new NotSupportedException("SmartThreadPool doesn't support delegates chains");
+                        }
+                }
+        }
+
+        #endregion
 }
diff --git a/ThirdParty/SmartThreadPool/WorkItemInfo.cs b/ThirdParty/SmartThreadPool/WorkItemInfo.cs
index c259339..0d7fc85 100644
--- a/ThirdParty/SmartThreadPool/WorkItemInfo.cs
+++ b/ThirdParty/SmartThreadPool/WorkItemInfo.cs
@@ -1,102 +1,69 @@
-// Ami Bar
-// amibar@gmail.com
-
 namespace Amib.Threading
 {
-    #region WorkItemInfo class
-
-    /// <summary>
-    /// Summary description for WorkItemInfo.
-    /// </summary>
-    public class WorkItemInfo
-    {
-        /// <summary>
-        /// Use the caller's security context
-        /// </summary>
-        private bool _useCallerCallContext;
-
-        /// <summary>
-        /// Use the caller's security context
-        /// </summary>
-        private bool _useCallerHttpContext;
-
-        /// <summary>
-        /// Dispose of the state object of a work item
-        /// </summary>
-        private bool _disposeOfStateObjects;
-
-        /// <summary>
-        /// The option to run the post execute
-        /// </summary>
-        private CallToPostExecute _callToPostExecute;
+        #region WorkItemInfo class
 
-        /// <summary>
-        /// A post execute callback to call when none is provided in 
-        /// the QueueWorkItem method.
-        /// </summary>
-        private PostExecuteWorkItemCallback _postExecuteWorkItemCallback;
-        
-        /// <summary>
-        /// The priority of the work item
-        /// </summary>
-        private WorkItemPriority _workItemPriority;
+        /// <summary>
+        /// Summary description for WorkItemInfo.
+        /// </summary>
+        public class WorkItemInfo
+        {
+            public WorkItemInfo()
+                {
+                        UseCallerCallContext = SmartThreadPool.DefaultUseCallerCallContext;
+                        UseCallerHttpContext = SmartThreadPool.DefaultUseCallerHttpContext;
+                        DisposeOfStateObjects = SmartThreadPool.DefaultDisposeOfStateObjects;
+                        CallToPostExecute = SmartThreadPool.DefaultCallToPostExecute;
+                        PostExecuteWorkItemCallback = SmartThreadPool.DefaultPostExecuteWorkItemCallback;
+                        WorkItemPriority = SmartThreadPool.DefaultWorkItemPriority;
+                }
 
-        public WorkItemInfo()
-        {
-            _useCallerCallContext = SmartThreadPool.DefaultUseCallerCallContext;
-            _useCallerHttpContext = SmartThreadPool.DefaultUseCallerHttpContext;
-            _disposeOfStateObjects = SmartThreadPool.DefaultDisposeOfStateObjects;
-            _callToPostExecute = SmartThreadPool.DefaultCallToPostExecute;
-            _postExecuteWorkItemCallback = SmartThreadPool.DefaultPostExecuteWorkItemCallback;
-            _workItemPriority = SmartThreadPool.DefaultWorkItemPriority;
-        }
+                public WorkItemInfo(WorkItemInfo workItemInfo)
+                {
+                        UseCallerCallContext = workItemInfo.UseCallerCallContext;
+                        UseCallerHttpContext = workItemInfo.UseCallerHttpContext;
+                        DisposeOfStateObjects = workItemInfo.DisposeOfStateObjects;
+                        CallToPostExecute = workItemInfo.CallToPostExecute;
+                        PostExecuteWorkItemCallback = workItemInfo.PostExecuteWorkItemCallback;
+                        WorkItemPriority = workItemInfo.WorkItemPriority;
+            Timeout = workItemInfo.Timeout;
+                }
 
-        public WorkItemInfo(WorkItemInfo workItemInfo)
-        {
-            _useCallerCallContext = workItemInfo._useCallerCallContext;
-            _useCallerHttpContext = workItemInfo._useCallerHttpContext;
-            _disposeOfStateObjects = workItemInfo._disposeOfStateObjects;
-            _callToPostExecute = workItemInfo._callToPostExecute;
-            _postExecuteWorkItemCallback = workItemInfo._postExecuteWorkItemCallback;
-            _workItemPriority = workItemInfo._workItemPriority;
-        }
+            /// <summary>
+            /// Get/Set if to use the caller's security context
+            /// </summary>
+            public bool UseCallerCallContext { get; set; }
 
-        public bool UseCallerCallContext
-        {
-            get { return _useCallerCallContext; }
-            set { _useCallerCallContext = value; }
-        }
+            /// <summary>
+            /// Get/Set if to use the caller's HTTP context
+            /// </summary>
+            public bool UseCallerHttpContext { get; set; }
 
-        public bool UseCallerHttpContext
-        {
-            get { return _useCallerHttpContext; }
-            set { _useCallerHttpContext = value; }
-        }
+            /// <summary>
+            /// Get/Set if to dispose of the state object of a work item
+            /// </summary>
+            public bool DisposeOfStateObjects { get; set; }
 
-        public bool DisposeOfStateObjects
-        {
-            get { return _disposeOfStateObjects; }
-            set { _disposeOfStateObjects = value; }
-        }
+            /// <summary>
+            /// Get/Set the run the post execute options
+            /// </summary>
+        public CallToPostExecute CallToPostExecute { get; set; }
 
-        public CallToPostExecute CallToPostExecute
-        {
-            get { return _callToPostExecute; }
-            set { _callToPostExecute = value; }
-        }
+            /// <summary>
+            /// Get/Set the post execute callback
+            /// </summary>
+        public PostExecuteWorkItemCallback PostExecuteWorkItemCallback { get; set; }
 
-        public PostExecuteWorkItemCallback PostExecuteWorkItemCallback
-        {
-            get { return _postExecuteWorkItemCallback; }
-            set { _postExecuteWorkItemCallback = value; }
-        }
+            /// <summary>
+            /// Get/Set the work item's priority
+            /// </summary>
+            public WorkItemPriority WorkItemPriority { get; set; }
 
-        public WorkItemPriority WorkItemPriority
-        {
-            get { return _workItemPriority; }
-            set { _workItemPriority = value; }
-        }
-    }
+            /// <summary>
+            /// Get/Set the work item's timout in milliseconds.
+        /// This is a passive timout. When the timout expires the work item won't be actively aborted!
+            /// </summary>
+            public long Timeout { get; set; }
+        }
 
-    #endregion
+        #endregion
 }
diff --git a/ThirdParty/SmartThreadPool/WorkItemResultTWrapper.cs b/ThirdParty/SmartThreadPool/WorkItemResultTWrapper.cs
new file mode 100644
index 0000000..d1eff95
--- /dev/null
+++ b/ThirdParty/SmartThreadPool/WorkItemResultTWrapper.cs
@@ -0,0 +1,128 @@
+using System;
+using System.Threading;
+
+namespace Amib.Threading.Internal
+{
+    #region WorkItemResultTWrapper class
+
+    internal class WorkItemResultTWrapper<TResult> : IWorkItemResult<TResult>, IInternalWaitableResult
+    {
+        private readonly IWorkItemResult _workItemResult;
+
+        public WorkItemResultTWrapper(IWorkItemResult workItemResult)
+        {
+            _workItemResult = workItemResult;
+        }
+
+        #region IWorkItemResult<TResult> Members
+
+        public TResult GetResult()
+        {
+            return (TResult)_workItemResult.GetResult();
+        }
+
+        public TResult GetResult(int millisecondsTimeout, bool exitContext)
+        {
+            return (TResult)_workItemResult.GetResult(millisecondsTimeout, exitContext);
+        }
+
+        public TResult GetResult(TimeSpan timeout, bool exitContext)
+        {
+            return (TResult)_workItemResult.GetResult(timeout, exitContext);
+        }
+
+        public TResult GetResult(int millisecondsTimeout, bool exitContext, WaitHandle cancelWaitHandle)
+        {
+            return (TResult)_workItemResult.GetResult(millisecondsTimeout, exitContext, cancelWaitHandle);
+        }
+
+        public TResult GetResult(TimeSpan timeout, bool exitContext, WaitHandle cancelWaitHandle)
+        {
+            return (TResult)_workItemResult.GetResult(timeout, exitContext, cancelWaitHandle);
+        }
+
+        public TResult GetResult(out Exception e)
+        {
+            return (TResult)_workItemResult.GetResult(out e);
+        }
+
+        public TResult GetResult(int millisecondsTimeout, bool exitContext, out Exception e)
+        {
+            return (TResult)_workItemResult.GetResult(millisecondsTimeout, exitContext, out e);
+        }
+
+        public TResult GetResult(TimeSpan timeout, bool exitContext, out Exception e)
+        {
+            return (TResult)_workItemResult.GetResult(timeout, exitContext, out e);
+        }
+
+        public TResult GetResult(int millisecondsTimeout, bool exitContext, WaitHandle cancelWaitHandle, out Exception e)
+        {
+            return (TResult)_workItemResult.GetResult(millisecondsTimeout, exitContext, cancelWaitHandle, out e);
+        }
+
+        public TResult GetResult(TimeSpan timeout, bool exitContext, WaitHandle cancelWaitHandle, out Exception e)
+        {
+            return (TResult)_workItemResult.GetResult(timeout, exitContext, cancelWaitHandle, out e);
+        }
+
+        public bool IsCompleted
+        {
+            get { return _workItemResult.IsCompleted; }
+        }
+
+        public bool IsCanceled
+        {
+            get { return _workItemResult.IsCanceled; }
+        }
+
+        public object State
+        {
+            get { return _workItemResult.State; }
+        }
+
+        public bool Cancel()
+        {
+            return _workItemResult.Cancel();
+        }
+
+        public bool Cancel(bool abortExecution)
+        {
+            return _workItemResult.Cancel(abortExecution);
+        }
+
+        public WorkItemPriority WorkItemPriority
+        {
+            get { return _workItemResult.WorkItemPriority; }
+        }
+
+        public TResult Result
+        {
+            get { return (TResult)_workItemResult.Result; }
+        }
+
+        public object Exception
+        {
+            get { return (TResult)_workItemResult.Exception; }
+        }
+
+        #region IInternalWorkItemResult Members
+
+        public IWorkItemResult GetWorkItemResult()
+        {
+            return _workItemResult.GetWorkItemResult();
+        }
+
+        public IWorkItemResult<TRes> GetWorkItemResultT<TRes>()
+        {
+            return (IWorkItemResult<TRes>)this;
+        }
+
+        #endregion
+
+        #endregion
+    }
+
+    #endregion
+
+}
diff --git a/ThirdParty/SmartThreadPool/WorkItemsGroup.cs b/ThirdParty/SmartThreadPool/WorkItemsGroup.cs
index 01ac8dd..d9d34ac 100644
--- a/ThirdParty/SmartThreadPool/WorkItemsGroup.cs
+++ b/ThirdParty/SmartThreadPool/WorkItemsGroup.cs
@@ -1,6 +1,3 @@
-// Ami Bar
-// amibar@gmail.com
-
 using System;
 using System.Threading;
 using System.Runtime.CompilerServices;
@@ -8,505 +5,357 @@ using System.Diagnostics;
 
 namespace Amib.Threading.Internal
 {
-    #region WorkItemsGroup class 
-
-    /// <summary>
-    /// Summary description for WorkItemsGroup.
-    /// </summary>
-    public class WorkItemsGroup : IWorkItemsGroup
-    {
-        #region Private members
-
-        private object _lock = new object();
-        /// <summary>
-        /// Contains the name of this instance of SmartThreadPool.
-        /// Can be changed by the user.
-        /// </summary>
-        private string _name = "WorkItemsGroup";
-
-        /// <summary>
-        /// A reference to the SmartThreadPool instance that created this 
-        /// WorkItemsGroup.
-        /// </summary>
-        private SmartThreadPool _stp;
-
-        /// <summary>
-        /// The OnIdle event
-        /// </summary>
-        private event WorkItemsGroupIdleHandler _onIdle;
 
-        /// <summary>
-        /// Defines how many work items of this WorkItemsGroup can run at once.
-        /// </summary>
-        private int _concurrency;
+        #region WorkItemsGroup class 
 
-        /// <summary>
-        /// Priority queue to hold work items before they are passed 
-        /// to the SmartThreadPool.
-        /// </summary>
-        private PriorityQueue _workItemsQueue;
+        /// <summary>
+        /// Summary description for WorkItemsGroup.
+        /// </summary>
+        public class WorkItemsGroup : WorkItemsGroupBase
+        {
+                #region Private members
 
-        /// <summary>
-        /// Indicate how many work items are waiting in the SmartThreadPool
-        /// queue.
-        /// This value is used to apply the concurrency.
-        /// </summary>
-        private int _workItemsInStpQueue;
+                private readonly object _lock = new object();
 
-        /// <summary>
-        /// Indicate how many work items are currently running in the SmartThreadPool.
-        /// This value is used with the Cancel, to calculate if we can send new 
-        /// work items to the STP.
-        /// </summary>
-        private int _workItemsExecutingInStp = 0;
+                /// <summary>
+                /// A reference to the SmartThreadPool instance that created this 
+                /// WorkItemsGroup.
+                /// </summary>
+                private readonly SmartThreadPool _stp;
 
-        /// <summary>
-        /// WorkItemsGroup start information
-        /// </summary>
-        private WIGStartInfo _workItemsGroupStartInfo;
+                /// <summary>
+                /// The OnIdle event
+                /// </summary>
+                private event WorkItemsGroupIdleHandler _onIdle;
 
         /// <summary>
-        /// Signaled when all of the WorkItemsGroup's work item completed.
+        /// A flag to indicate if the Work Items Group is now suspended.
         /// </summary>
-        private ManualResetEvent _isIdleWaitHandle = new ManualResetEvent(true);
-
-        /// <summary>
-        /// A common object for all the work items that this work items group
-        /// generate so we can mark them to cancel in O(1)
-        /// </summary>
-        private CanceledWorkItemsGroup _canceledWorkItemsGroup = new CanceledWorkItemsGroup();
-
-        #endregion 
-
-        #region Construction
-
-        public WorkItemsGroup(
-            SmartThreadPool stp, 
-            int concurrency, 
-            WIGStartInfo wigStartInfo)
+        private bool _isSuspended;
+
+                /// <summary>
+                /// Defines how many work items of this WorkItemsGroup can run at once.
+                /// </summary>
+                private int _concurrency;
+
+                /// <summary>
+                /// Priority queue to hold work items before they are passed 
+                /// to the SmartThreadPool.
+                /// </summary>
+                private readonly PriorityQueue _workItemsQueue;
+
+                /// <summary>
+                /// Indicate how many work items are waiting in the SmartThreadPool
+                /// queue.
+                /// This value is used to apply the concurrency.
+                /// </summary>
+                private int _workItemsInStpQueue;
+
+                /// <summary>
+                /// Indicate how many work items are currently running in the SmartThreadPool.
+                /// This value is used with the Cancel, to calculate if we can send new 
+                /// work items to the STP.
+                /// </summary>
+                private int _workItemsExecutingInStp = 0;
+
+                /// <summary>
+                /// WorkItemsGroup start information
+                /// </summary>
+                private readonly WIGStartInfo _workItemsGroupStartInfo;
+
+                /// <summary>
+                /// Signaled when all of the WorkItemsGroup's work item completed.
+                /// </summary>
+        //private readonly ManualResetEvent _isIdleWaitHandle = new ManualResetEvent(true);
+        private readonly ManualResetEvent _isIdleWaitHandle = EventWaitHandleFactory.CreateManualResetEvent(true);
+
+                /// <summary>
+                /// A common object for all the work items that this work items group
+                /// generate so we can mark them to cancel in O(1)
+                /// </summary>
+                private CanceledWorkItemsGroup _canceledWorkItemsGroup = new CanceledWorkItemsGroup();
+
+                #endregion 
+
+                #region Construction
+
+            public WorkItemsGroup(
+                        SmartThreadPool stp, 
+                        int concurrency, 
+                        WIGStartInfo wigStartInfo)
+                {
+                        if (concurrency <= 0)
+                        {
+                                throw new ArgumentOutOfRangeException(
+                    "concurrency",
+#if !(_WINDOWS_CE) && !(_SILVERLIGHT) && !(WINDOWS_PHONE)
+                    concurrency,
+#endif
+ "concurrency must be greater than zero");
+                        }
+                        _stp = stp;
+                        _concurrency = concurrency;
+                        _workItemsGroupStartInfo = new WIGStartInfo(wigStartInfo).AsReadOnly();
+                        _workItemsQueue = new PriorityQueue();
+                Name = "WorkItemsGroup";
+
+                        // The _workItemsInStpQueue gets the number of currently executing work items,
+                        // because once a work item is executing, it cannot be cancelled.
+                        _workItemsInStpQueue = _workItemsExecutingInStp;
+
+            _isSuspended = _workItemsGroupStartInfo.StartSuspended;
+                }
+
+                #endregion 
+
+        #region WorkItemsGroupBase Overrides
+
+        public override int Concurrency
         {
-            if (concurrency <= 0)
-            {
-                throw new ArgumentOutOfRangeException("concurrency", concurrency, "concurrency must be greater than zero");
-            }
-            _stp = stp;
-            _concurrency = concurrency;
-            _workItemsGroupStartInfo = new WIGStartInfo(wigStartInfo);
-            _workItemsQueue = new PriorityQueue();
-
-            // The _workItemsInStpQueue gets the number of currently executing work items,
-            // because once a work item is executing, it cannot be cancelled.
-            _workItemsInStpQueue = _workItemsExecutingInStp;
-        }
-
-        #endregion 
-
-        #region IWorkItemsGroup implementation
-
-        /// <summary>
-        /// Get/Set the name of the SmartThreadPool instance
-        /// </summary>
-        public string Name 
-        { 
-            get
-            {
-                return _name;
-            }
-
+            get { return _concurrency; }
             set
             {
-                _name = value;
-            }
-        }
-
-        /// <summary>
-        /// Queue a work item
-        /// </summary>
-        /// <param name="callback">A callback to execute</param>
-        /// <returns>Returns a work item result</returns>
-        public IWorkItemResult QueueWorkItem(WorkItemCallback callback)
-        {
-            WorkItem workItem = WorkItemFactory.CreateWorkItem(this, _workItemsGroupStartInfo, callback);
-            EnqueueToSTPNextWorkItem(workItem);
-            return workItem.GetWorkItemResult();
-        }
+                Debug.Assert(value > 0);
 
-        /// <summary>
-        /// Queue a work item
-        /// </summary>
-        /// <param name="callback">A callback to execute</param>
-        /// <param name="workItemPriority">The priority of the work item</param>
-        /// <returns>Returns a work item result</returns>
-        public IWorkItemResult QueueWorkItem(WorkItemCallback callback, WorkItemPriority workItemPriority)
-        {
-            WorkItem workItem = WorkItemFactory.CreateWorkItem(this, _workItemsGroupStartInfo, callback, workItemPriority);
-            EnqueueToSTPNextWorkItem(workItem);
-            return workItem.GetWorkItemResult();
-        }
-
-        /// <summary>
-        /// Queue a work item
-        /// </summary>
-        /// <param name="workItemInfo">Work item info</param>
-        /// <param name="callback">A callback to execute</param>
-        /// <returns>Returns a work item result</returns>
-        public IWorkItemResult QueueWorkItem(WorkItemInfo workItemInfo, WorkItemCallback callback)
-        {
-            WorkItem workItem = WorkItemFactory.CreateWorkItem(this, _workItemsGroupStartInfo, workItemInfo, callback);
-            EnqueueToSTPNextWorkItem(workItem);
-            return workItem.GetWorkItemResult();
-        }
-
-        /// <summary>
-        /// Queue a work item
-        /// </summary>
-        /// <param name="callback">A callback to execute</param>
-        /// <param name="state">
-        /// The context object of the work item. Used for passing arguments to the work item. 
-        /// </param>
-        /// <returns>Returns a work item result</returns>
-        public IWorkItemResult QueueWorkItem(WorkItemCallback callback, object state)
-        {
-            WorkItem workItem = WorkItemFactory.CreateWorkItem(this, _workItemsGroupStartInfo, callback, state);
-            EnqueueToSTPNextWorkItem(workItem);
-            return workItem.GetWorkItemResult();
-        }
-
-        /// <summary>
-        /// Queue a work item
-        /// </summary>
-        /// <param name="callback">A callback to execute</param>
-        /// <param name="state">
-        /// The context object of the work item. Used for passing arguments to the work item. 
-        /// </param>
-        /// <param name="workItemPriority">The work item priority</param>
-        /// <returns>Returns a work item result</returns>
-        public IWorkItemResult QueueWorkItem(WorkItemCallback callback, object state, WorkItemPriority workItemPriority)
-        {
-            WorkItem workItem = WorkItemFactory.CreateWorkItem(this, _workItemsGroupStartInfo, callback, state, workItemPriority);
-            EnqueueToSTPNextWorkItem(workItem);
-            return workItem.GetWorkItemResult();
-        }
-
-        /// <summary>
-        /// Queue a work item
-        /// </summary>
-        /// <param name="workItemInfo">Work item information</param>
-        /// <param name="callback">A callback to execute</param>
-        /// <param name="state">
-        /// The context object of the work item. Used for passing arguments to the work item. 
-        /// </param>
-        /// <returns>Returns a work item result</returns>
-        public IWorkItemResult QueueWorkItem(WorkItemInfo workItemInfo, WorkItemCallback callback, object state)
-        {
-            WorkItem workItem = WorkItemFactory.CreateWorkItem(this, _workItemsGroupStartInfo, workItemInfo, callback, state);
-            EnqueueToSTPNextWorkItem(workItem);
-            return workItem.GetWorkItemResult();
-        }
-
-        /// <summary>
-        /// Queue a work item
-        /// </summary>
-        /// <param name="callback">A callback to execute</param>
-        /// <param name="state">
-        /// The context object of the work item. Used for passing arguments to the work item. 
-        /// </param>
-        /// <param name="postExecuteWorkItemCallback">
-        /// A delegate to call after the callback completion
-        /// </param>
-        /// <returns>Returns a work item result</returns>
-        public IWorkItemResult QueueWorkItem(
-            WorkItemCallback callback, 
-            object state,
-            PostExecuteWorkItemCallback postExecuteWorkItemCallback)
-        {
-            WorkItem workItem = WorkItemFactory.CreateWorkItem(this, _workItemsGroupStartInfo, callback, state, postExecuteWorkItemCallback);
-            EnqueueToSTPNextWorkItem(workItem);
-            return workItem.GetWorkItemResult();
-        }
-
-        /// <summary>
-        /// Queue a work item
-        /// </summary>
-        /// <param name="callback">A callback to execute</param>
-        /// <param name="state">
-        /// The context object of the work item. Used for passing arguments to the work item. 
-        /// </param>
-        /// <param name="postExecuteWorkItemCallback">
-        /// A delegate to call after the callback completion
-        /// </param>
-        /// <param name="workItemPriority">The work item priority</param>
-        /// <returns>Returns a work item result</returns>
-        public IWorkItemResult QueueWorkItem(
-            WorkItemCallback callback, 
-            object state,
-            PostExecuteWorkItemCallback postExecuteWorkItemCallback,
-            WorkItemPriority workItemPriority)
-        {
-            WorkItem workItem = WorkItemFactory.CreateWorkItem(this, _workItemsGroupStartInfo, callback, state, postExecuteWorkItemCallback, workItemPriority);
-            EnqueueToSTPNextWorkItem(workItem);
-            return workItem.GetWorkItemResult();
-        }
-
-        /// <summary>
-        /// Queue a work item
-        /// </summary>
-        /// <param name="callback">A callback to execute</param>
-        /// <param name="state">
-        /// The context object of the work item. Used for passing arguments to the work item. 
-        /// </param>
-        /// <param name="postExecuteWorkItemCallback">
-        /// A delegate to call after the callback completion
-        /// </param>
-        /// <param name="callToPostExecute">Indicates on which cases to call to the post execute callback</param>
-        /// <returns>Returns a work item result</returns>
-        public IWorkItemResult QueueWorkItem(
-            WorkItemCallback callback, 
-            object state,
-            PostExecuteWorkItemCallback postExecuteWorkItemCallback,
-            CallToPostExecute callToPostExecute)
-        {
-            WorkItem workItem = WorkItemFactory.CreateWorkItem(this, _workItemsGroupStartInfo, callback, state, postExecuteWorkItemCallback, callToPostExecute);
-            EnqueueToSTPNextWorkItem(workItem);
-            return workItem.GetWorkItemResult();
+                int diff = value - _concurrency;
+                _concurrency = value;
+                if (diff > 0)
+                {
+                    EnqueueToSTPNextNWorkItem(diff);
+                }
+            }
         }
 
-        /// <summary>
-        /// Queue a work item
-        /// </summary>
-        /// <param name="callback">A callback to execute</param>
-        /// <param name="state">
-        /// The context object of the work item. Used for passing arguments to the work item. 
-        /// </param>
-        /// <param name="postExecuteWorkItemCallback">
-        /// A delegate to call after the callback completion
-        /// </param>
-        /// <param name="callToPostExecute">Indicates on which cases to call to the post execute callback</param>
-        /// <param name="workItemPriority">The work item priority</param>
-        /// <returns>Returns a work item result</returns>
-        public IWorkItemResult QueueWorkItem(
-            WorkItemCallback callback, 
-            object state,
-            PostExecuteWorkItemCallback postExecuteWorkItemCallback,
-            CallToPostExecute callToPostExecute,
-            WorkItemPriority workItemPriority)
+        public override int WaitingCallbacks
         {
-            WorkItem workItem = WorkItemFactory.CreateWorkItem(this, _workItemsGroupStartInfo, callback, state, postExecuteWorkItemCallback, callToPostExecute, workItemPriority);
-            EnqueueToSTPNextWorkItem(workItem);
-            return workItem.GetWorkItemResult();
+            get { return _workItemsQueue.Count; }
         }
 
-        /// <summary>
-        /// Wait for the thread pool to be idle
-        /// </summary>
-        public void WaitForIdle()
+        public override object[] GetStates()
         {
-            WaitForIdle(Timeout.Infinite);
+            lock (_lock)
+            {
+                object[] states = new object[_workItemsQueue.Count];
+                int i = 0;
+                foreach (WorkItem workItem in _workItemsQueue)
+                {
+                    states[i] = workItem.GetWorkItemResult().State;
+                    ++i;
+                }
+                return states;
+            }
         }
 
-        /// <summary>
-        /// Wait for the thread pool to be idle
+            /// <summary>
+        /// WorkItemsGroup start information
         /// </summary>
-        public bool WaitForIdle(TimeSpan timeout)
+        public override WIGStartInfo WIGStartInfo
         {
-            return WaitForIdle((int)timeout.TotalMilliseconds);
+            get { return _workItemsGroupStartInfo; }
         }
 
-        /// <summary>
+            /// <summary>
+            /// Start the Work Items Group if it was started suspended
+            /// </summary>
+            public override void Start()
+            {
+                // If the Work Items Group already started then quit
+                if (!_isSuspended)
+                {
+                    return;
+                }
+                _isSuspended = false;
+            
+                EnqueueToSTPNextNWorkItem(Math.Min(_workItemsQueue.Count, _concurrency));
+            }
+
+            public override void Cancel(bool abortExecution)
+            {
+                lock (_lock)
+                {
+                    _canceledWorkItemsGroup.IsCanceled = true;
+                    _workItemsQueue.Clear();
+                    _workItemsInStpQueue = 0;
+                    _canceledWorkItemsGroup = new CanceledWorkItemsGroup();
+                }
+
+                if (abortExecution)
+                {
+                    _stp.CancelAbortWorkItemsGroup(this);
+                }
+            }
+
+            /// <summary>
         /// Wait for the thread pool to be idle
         /// </summary>
-        public bool WaitForIdle(int millisecondsTimeout)
+        public override bool WaitForIdle(int millisecondsTimeout)
         {
-            _stp.ValidateWorkItemsGroupWaitForIdle(this);
-            return _isIdleWaitHandle.WaitOne(millisecondsTimeout, false);
+            SmartThreadPool.ValidateWorkItemsGroupWaitForIdle(this);
+            return STPEventWaitHandle.WaitOne(_isIdleWaitHandle, millisecondsTimeout, false);
         }
 
-        public int WaitingCallbacks
-        {
-            get
-            {
-                return _workItemsQueue.Count;
-            }
-        }
+            public override event WorkItemsGroupIdleHandler OnIdle
+                {
+                        add { _onIdle += value; }
+                        remove { _onIdle -= value; }
+                }
 
-        public event WorkItemsGroupIdleHandler OnIdle
-        {
-            add
-            {
-                _onIdle += value;
-            }
-            remove
-            {
-                _onIdle -= value;
-            }
-        }
+            #endregion 
 
-        public void Cancel()
-        {
-            lock(_lock)
-            {
-                _canceledWorkItemsGroup.IsCanceled = true;
-                _workItemsQueue.Clear();
-                _workItemsInStpQueue = 0;
-                _canceledWorkItemsGroup = new CanceledWorkItemsGroup();
-            }
-        }
+                #region Private methods
 
-        public void Start()
-        {
-            lock (this)
-            {
-                if (!_workItemsGroupStartInfo.StartSuspended)
-                {
-                    return;
-                }
-                _workItemsGroupStartInfo.StartSuspended = false;
-            }
-            
-            for(int i = 0; i < _concurrency; ++i)
-            {
-                EnqueueToSTPNextWorkItem(null, false);
-            }
-        }
-
-        #endregion 
+            private void RegisterToWorkItemCompletion(IWorkItemResult wir)
+                {
+                        IInternalWorkItemResult iwir = (IInternalWorkItemResult)wir;
+                        iwir.OnWorkItemStarted += OnWorkItemStartedCallback;
+                        iwir.OnWorkItemCompleted += OnWorkItemCompletedCallback;
+                }
 
-        #region Private methods
-
-        private void RegisterToWorkItemCompletion(IWorkItemResult wir)
-        {
-            IInternalWorkItemResult iwir = wir as IInternalWorkItemResult;
-            iwir.OnWorkItemStarted += new WorkItemStateCallback(OnWorkItemStartedCallback);
-            iwir.OnWorkItemCompleted += new WorkItemStateCallback(OnWorkItemCompletedCallback);
-        }
-
-        public void OnSTPIsStarting()
-        {
-            lock (this)
-            {
-                if (_workItemsGroupStartInfo.StartSuspended)
-                {
-                    return;
-                }
-            }
-            
-            for(int i = 0; i < _concurrency; ++i)
-            {
-                EnqueueToSTPNextWorkItem(null, false);
-            }
-        }
-
-        private object FireOnIdle(object state)
-        {
-            FireOnIdleImpl(_onIdle);
-            return null;
-        }
-
-        [MethodImpl(MethodImplOptions.NoInlining)]
-        private void FireOnIdleImpl(WorkItemsGroupIdleHandler onIdle)
-        {
-            if(null == onIdle)
+            public void OnSTPIsStarting()
+                {
+            if (_isSuspended)
             {
                 return;
             }
+                        
+            EnqueueToSTPNextNWorkItem(_concurrency);
+                }
 
-            Delegate[] delegates = onIdle.GetInvocationList();
-            foreach(WorkItemsGroupIdleHandler eh in delegates)
-            {
-                try
-                {
-                    eh(this);
-                }
-                    // Ignore exceptions
-                catch{} 
-            }
-        }
-
-        private void OnWorkItemStartedCallback(WorkItem workItem)
+            public void EnqueueToSTPNextNWorkItem(int count)
         {
-            lock(_lock)
+            for (int i = 0; i < count; ++i)
             {
-                ++_workItemsExecutingInStp;
+                EnqueueToSTPNextWorkItem(null, false);
             }
         }
 
-        private void OnWorkItemCompletedCallback(WorkItem workItem)
-        {
-            EnqueueToSTPNextWorkItem(null, true);
-        }
-
-        private void EnqueueToSTPNextWorkItem(WorkItem workItem)
+                private object FireOnIdle(object state)
+                {
+                        FireOnIdleImpl(_onIdle);
+                        return null;
+                }
+
+                [MethodImpl(MethodImplOptions.NoInlining)]
+                private void FireOnIdleImpl(WorkItemsGroupIdleHandler onIdle)
+                {
+                        if(null == onIdle)
+                        {
+                                return;
+                        }
+
+                        Delegate[] delegates = onIdle.GetInvocationList();
+                        foreach(WorkItemsGroupIdleHandler eh in delegates)
+                        {
+                                try
+                                {
+                                        eh(this);
+                                }
+                catch { }  // Suppress exceptions
+                        }
+                }
+
+                private void OnWorkItemStartedCallback(WorkItem workItem)
+                {
+                        lock(_lock)
+                        {
+                                ++_workItemsExecutingInStp;
+                        }
+                }
+
+                private void OnWorkItemCompletedCallback(WorkItem workItem)
+                {
+                        EnqueueToSTPNextWorkItem(null, true);
+                }
+
+        internal override void Enqueue(WorkItem workItem)
         {
-            EnqueueToSTPNextWorkItem(workItem, false);
+            EnqueueToSTPNextWorkItem(workItem);
         }
 
-        private void EnqueueToSTPNextWorkItem(WorkItem workItem, bool decrementWorkItemsInStpQueue)
-        {
-            lock(_lock)
-            {
-                // Got here from OnWorkItemCompletedCallback()
-                if (decrementWorkItemsInStpQueue)
-                {
-                    --_workItemsInStpQueue;
-
-                    if(_workItemsInStpQueue < 0)
-                    {
-                        _workItemsInStpQueue = 0;
-                    }
-
-                    --_workItemsExecutingInStp;
-
-                    if(_workItemsExecutingInStp < 0)
-                    {
-                        _workItemsExecutingInStp = 0;
-                    }
-                }
-
-                // If the work item is not null then enqueue it
-                if (null != workItem)
-                {
-                    workItem.CanceledWorkItemsGroup = _canceledWorkItemsGroup;
-
-                    RegisterToWorkItemCompletion(workItem.GetWorkItemResult());
-                    _workItemsQueue.Enqueue(workItem);
-                    //_stp.IncrementWorkItemsCount();
-
-                    if ((1 == _workItemsQueue.Count) && 
-                        (0 == _workItemsInStpQueue))
-                    {
-                        _stp.RegisterWorkItemsGroup(this);
-                        Trace.WriteLine("WorkItemsGroup " + Name + " is NOT idle");
+            private void EnqueueToSTPNextWorkItem(WorkItem workItem)
+                {
+                        EnqueueToSTPNextWorkItem(workItem, false);
+                }
+
+                private void EnqueueToSTPNextWorkItem(WorkItem workItem, bool decrementWorkItemsInStpQueue)
+                {
+                        lock(_lock)
+                        {
+                                // Got here from OnWorkItemCompletedCallback()
+                                if (decrementWorkItemsInStpQueue)
+                                {
+                                        --_workItemsInStpQueue;
+
+                                        if(_workItemsInStpQueue < 0)
+                                        {
+                                                _workItemsInStpQueue = 0;
+                                        }
+
+                                        --_workItemsExecutingInStp;
+
+                                        if(_workItemsExecutingInStp < 0)
+                                        {
+                                                _workItemsExecutingInStp = 0;
+                                        }
+                                }
+
+                                // If the work item is not null then enqueue it
+                                if (null != workItem)
+                                {
+                                        workItem.CanceledWorkItemsGroup = _canceledWorkItemsGroup;
+
+                                        RegisterToWorkItemCompletion(workItem.GetWorkItemResult());
+                                        _workItemsQueue.Enqueue(workItem);
+                                        //_stp.IncrementWorkItemsCount();
+
+                                        if ((1 == _workItemsQueue.Count) && 
+                                                (0 == _workItemsInStpQueue))
+                                        {
+                                                _stp.RegisterWorkItemsGroup(this);
+                        IsIdle = false;
                         _isIdleWaitHandle.Reset();
-                    }
-                }
-
-                // If the work items queue of the group is empty than quit
-                if (0 == _workItemsQueue.Count)
-                {
-                    if (0 == _workItemsInStpQueue)
-                    {
-                        _stp.UnregisterWorkItemsGroup(this);
-                        Trace.WriteLine("WorkItemsGroup " + Name + " is idle");
+                                        }
+                                }
+
+                                // If the work items queue of the group is empty than quit
+                                if (0 == _workItemsQueue.Count)
+                                {
+                                        if (0 == _workItemsInStpQueue)
+                                        {
+                                                _stp.UnregisterWorkItemsGroup(this);
+                        IsIdle = true;
                         _isIdleWaitHandle.Set();
-                        _stp.QueueWorkItem(new WorkItemCallback(this.FireOnIdle));
-                    }
-                    return;
-                }
-
-                if (!_workItemsGroupStartInfo.StartSuspended)
-                {
-                    if (_workItemsInStpQueue < _concurrency)
-                    {
-                        WorkItem nextWorkItem = _workItemsQueue.Dequeue() as WorkItem;
-                        _stp.Enqueue(nextWorkItem, true);
-                        ++_workItemsInStpQueue;
-                    }
-                }
-            }
-        }
-
-        #endregion
+                        if (decrementWorkItemsInStpQueue && _onIdle != null && _onIdle.GetInvocationList().Length > 0)
+                        {
+                            _stp.QueueWorkItem(new WorkItemCallback(FireOnIdle));
+                        }
+                                        }
+                                        return;
+                                }
+
+                if (!_isSuspended)
+                                {
+                                        if (_workItemsInStpQueue < _concurrency)
+                                        {
+                                                WorkItem nextWorkItem = _workItemsQueue.Dequeue() as WorkItem;
+                        try
+                        {
+                            _stp.Enqueue(nextWorkItem);
+                        }
+                        catch (ObjectDisposedException e)
+                        {
+                            e.GetHashCode();
+                            // The STP has been shutdown
+                        }
+
+                                                ++_workItemsInStpQueue;
+                                        }
+                                }
+                        }
+                }
+
+                #endregion
     }
 
-    #endregion
+        #endregion
 }
diff --git a/ThirdParty/SmartThreadPool/WorkItemsGroupBase.cs b/ThirdParty/SmartThreadPool/WorkItemsGroupBase.cs
new file mode 100644
index 0000000..27fae5e
--- /dev/null
+++ b/ThirdParty/SmartThreadPool/WorkItemsGroupBase.cs
@@ -0,0 +1,471 @@
+using System;
+using System.Threading;
+
+namespace Amib.Threading.Internal
+{
+    public abstract class WorkItemsGroupBase : IWorkItemsGroup
+    {
+        #region Private Fields
+
+        /// <summary>
+        /// Contains the name of this instance of SmartThreadPool.
+        /// Can be changed by the user.
+        /// </summary>
+        private string _name = "WorkItemsGroupBase";
+
+        public WorkItemsGroupBase()
+        {
+            IsIdle = true;
+        }
+
+        #endregion
+
+        #region IWorkItemsGroup Members
+
+        #region Public Methods
+
+        /// <summary>
+        /// Get/Set the name of the SmartThreadPool/WorkItemsGroup instance
+        /// </summary>
+        public string Name
+        {
+            get { return _name; }
+            set { _name = value; }
+        }
+
+        #endregion
+
+        #region Abstract Methods
+
+        public abstract int Concurrency { get; set; }
+        public abstract int WaitingCallbacks { get; }
+        public abstract object[] GetStates();
+        public abstract WIGStartInfo WIGStartInfo { get; }
+        public abstract void Start();
+        public abstract void Cancel(bool abortExecution);
+        public abstract bool WaitForIdle(int millisecondsTimeout);
+        public abstract event WorkItemsGroupIdleHandler OnIdle;
+
+        internal abstract void Enqueue(WorkItem workItem);
+        internal virtual void PreQueueWorkItem() { }
+
+        #endregion
+
+        #region Common Base Methods
+
+        /// <summary>
+        /// Cancel all the work items.
+        /// Same as Cancel(false)
+        /// </summary>
+        public virtual void Cancel()
+        {
+            Cancel(false);
+        }
+
+        /// <summary>
+        /// Wait for the SmartThreadPool/WorkItemsGroup to be idle
+        /// </summary>
+        public void WaitForIdle()
+        {
+            WaitForIdle(Timeout.Infinite);
+        }
+
+        /// <summary>
+        /// Wait for the SmartThreadPool/WorkItemsGroup to be idle
+        /// </summary>
+        public bool WaitForIdle(TimeSpan timeout)
+        {
+            return WaitForIdle((int)timeout.TotalMilliseconds);
+        }
+
+        /// <summary>
+        /// IsIdle is true when there are no work items running or queued.
+        /// </summary>
+        public bool IsIdle { get; protected set; }
+
+        #endregion
+
+        #region QueueWorkItem
+
+        /// <summary>
+        /// Queue a work item
+        /// </summary>
+        /// <param name="callback">A callback to execute</param>
+        /// <returns>Returns a work item result</returns>
+        public IWorkItemResult QueueWorkItem(WorkItemCallback callback)
+        {
+            WorkItem workItem = WorkItemFactory.CreateWorkItem(this, WIGStartInfo, callback);
+            Enqueue(workItem);
+            return workItem.GetWorkItemResult();
+        }
+
+        /// <summary>
+        /// Queue a work item
+        /// </summary>
+        /// <param name="callback">A callback to execute</param>
+        /// <param name="workItemPriority">The priority of the work item</param>
+        /// <returns>Returns a work item result</returns>
+        public IWorkItemResult QueueWorkItem(WorkItemCallback callback, WorkItemPriority workItemPriority)
+        {
+            PreQueueWorkItem();
+            WorkItem workItem = WorkItemFactory.CreateWorkItem(this, WIGStartInfo, callback, workItemPriority);
+            Enqueue(workItem);
+            return workItem.GetWorkItemResult();
+        }
+
+        /// <summary>
+        /// Queue a work item
+        /// </summary>
+        /// <param name="workItemInfo">Work item info</param>
+        /// <param name="callback">A callback to execute</param>
+        /// <returns>Returns a work item result</returns>
+        public IWorkItemResult QueueWorkItem(WorkItemInfo workItemInfo, WorkItemCallback callback)
+        {
+            PreQueueWorkItem();
+            WorkItem workItem = WorkItemFactory.CreateWorkItem(this, WIGStartInfo, workItemInfo, callback);
+            Enqueue(workItem);
+            return workItem.GetWorkItemResult();
+        }
+
+        /// <summary>
+        /// Queue a work item
+        /// </summary>
+        /// <param name="callback">A callback to execute</param>
+        /// <param name="state">
+        /// The context object of the work item. Used for passing arguments to the work item. 
+        /// </param>
+        /// <returns>Returns a work item result</returns>
+        public IWorkItemResult QueueWorkItem(WorkItemCallback callback, object state)
+        {
+            WorkItem workItem = WorkItemFactory.CreateWorkItem(this, WIGStartInfo, callback, state);
+            Enqueue(workItem);
+            return workItem.GetWorkItemResult();
+        }
+
+        /// <summary>
+        /// Queue a work item
+        /// </summary>
+        /// <param name="callback">A callback to execute</param>
+        /// <param name="state">
+        /// The context object of the work item. Used for passing arguments to the work item. 
+        /// </param>
+        /// <param name="workItemPriority">The work item priority</param>
+        /// <returns>Returns a work item result</returns>
+        public IWorkItemResult QueueWorkItem(WorkItemCallback callback, object state, WorkItemPriority workItemPriority)
+        {
+            PreQueueWorkItem();
+            WorkItem workItem = WorkItemFactory.CreateWorkItem(this, WIGStartInfo, callback, state, workItemPriority);
+            Enqueue(workItem);
+            return workItem.GetWorkItemResult();
+        }
+
+        /// <summary>
+        /// Queue a work item
+        /// </summary>
+        /// <param name="workItemInfo">Work item information</param>
+        /// <param name="callback">A callback to execute</param>
+        /// <param name="state">
+        /// The context object of the work item. Used for passing arguments to the work item. 
+        /// </param>
+        /// <returns>Returns a work item result</returns>
+        public IWorkItemResult QueueWorkItem(WorkItemInfo workItemInfo, WorkItemCallback callback, object state)
+        {
+            PreQueueWorkItem();
+            WorkItem workItem = WorkItemFactory.CreateWorkItem(this, WIGStartInfo, workItemInfo, callback, state);
+            Enqueue(workItem);
+            return workItem.GetWorkItemResult();
+        }
+
+        /// <summary>
+        /// Queue a work item
+        /// </summary>
+        /// <param name="callback">A callback to execute</param>
+        /// <param name="state">
+        /// The context object of the work item. Used for passing arguments to the work item. 
+        /// </param>
+        /// <param name="postExecuteWorkItemCallback">
+        /// A delegate to call after the callback completion
+        /// </param>
+        /// <returns>Returns a work item result</returns>
+        public IWorkItemResult QueueWorkItem(
+            WorkItemCallback callback,
+            object state,
+            PostExecuteWorkItemCallback postExecuteWorkItemCallback)
+        {
+            PreQueueWorkItem();
+            WorkItem workItem = WorkItemFactory.CreateWorkItem(this, WIGStartInfo, callback, state, postExecuteWorkItemCallback);
+            Enqueue(workItem);
+            return workItem.GetWorkItemResult();
+        }
+
+        /// <summary>
+        /// Queue a work item
+        /// </summary>
+        /// <param name="callback">A callback to execute</param>
+        /// <param name="state">
+        /// The context object of the work item. Used for passing arguments to the work item. 
+        /// </param>
+        /// <param name="postExecuteWorkItemCallback">
+        /// A delegate to call after the callback completion
+        /// </param>
+        /// <param name="workItemPriority">The work item priority</param>
+        /// <returns>Returns a work item result</returns>
+        public IWorkItemResult QueueWorkItem(
+            WorkItemCallback callback,
+            object state,
+            PostExecuteWorkItemCallback postExecuteWorkItemCallback,
+            WorkItemPriority workItemPriority)
+        {
+            PreQueueWorkItem();
+            WorkItem workItem = WorkItemFactory.CreateWorkItem(this, WIGStartInfo, callback, state, postExecuteWorkItemCallback, workItemPriority);
+            Enqueue(workItem);
+            return workItem.GetWorkItemResult();
+        }
+
+        /// <summary>
+        /// Queue a work item
+        /// </summary>
+        /// <param name="callback">A callback to execute</param>
+        /// <param name="state">
+        /// The context object of the work item. Used for passing arguments to the work item. 
+        /// </param>
+        /// <param name="postExecuteWorkItemCallback">
+        /// A delegate to call after the callback completion
+        /// </param>
+        /// <param name="callToPostExecute">Indicates on which cases to call to the post execute callback</param>
+        /// <returns>Returns a work item result</returns>
+        public IWorkItemResult QueueWorkItem(
+            WorkItemCallback callback,
+            object state,
+            PostExecuteWorkItemCallback postExecuteWorkItemCallback,
+            CallToPostExecute callToPostExecute)
+        {
+            PreQueueWorkItem();
+            WorkItem workItem = WorkItemFactory.CreateWorkItem(this, WIGStartInfo, callback, state, postExecuteWorkItemCallback, callToPostExecute);
+            Enqueue(workItem);
+            return workItem.GetWorkItemResult();
+        }
+
+        /// <summary>
+        /// Queue a work item
+        /// </summary>
+        /// <param name="callback">A callback to execute</param>
+        /// <param name="state">
+        /// The context object of the work item. Used for passing arguments to the work item. 
+        /// </param>
+        /// <param name="postExecuteWorkItemCallback">
+        /// A delegate to call after the callback completion
+        /// </param>
+        /// <param name="callToPostExecute">Indicates on which cases to call to the post execute callback</param>
+        /// <param name="workItemPriority">The work item priority</param>
+        /// <returns>Returns a work item result</returns>
+        public IWorkItemResult QueueWorkItem(
+            WorkItemCallback callback,
+            object state,
+            PostExecuteWorkItemCallback postExecuteWorkItemCallback,
+            CallToPostExecute callToPostExecute,
+            WorkItemPriority workItemPriority)
+        {
+            PreQueueWorkItem();
+            WorkItem workItem = WorkItemFactory.CreateWorkItem(this, WIGStartInfo, callback, state, postExecuteWorkItemCallback, callToPostExecute, workItemPriority);
+            Enqueue(workItem);
+            return workItem.GetWorkItemResult();
+        }
+
+        #endregion
+
+        #region QueueWorkItem(Action<...>)
+
+        public IWorkItemResult QueueWorkItem(Action action)
+        {
+            return QueueWorkItem (action, SmartThreadPool.DefaultWorkItemPriority);
+        }
+
+        public IWorkItemResult QueueWorkItem (Action action, WorkItemPriority priority)
+        {
+            PreQueueWorkItem ();
+            WorkItem workItem = WorkItemFactory.CreateWorkItem (
+                this,
+                WIGStartInfo,
+                delegate
+                {
+                    action.Invoke ();
+                    return null;
+                }, priority);
+            Enqueue (workItem);
+            return workItem.GetWorkItemResult ();
+        }
+
+        public IWorkItemResult QueueWorkItem<T>(Action<T> action, T arg)
+        {
+            return QueueWorkItem<T> (action, arg, SmartThreadPool.DefaultWorkItemPriority);
+        }
+
+        public IWorkItemResult QueueWorkItem<T> (Action<T> action, T arg, WorkItemPriority priority)
+        {
+            PreQueueWorkItem ();
+            WorkItem workItem = WorkItemFactory.CreateWorkItem (
+                this,
+                WIGStartInfo,
+                state =>
+                {
+                    action.Invoke (arg);
+                    return null;
+                },
+                WIGStartInfo.FillStateWithArgs ? new object[] { arg } : null, priority);
+            Enqueue (workItem);
+            return workItem.GetWorkItemResult ();
+        }
+
+        public IWorkItemResult QueueWorkItem<T1, T2>(Action<T1, T2> action, T1 arg1, T2 arg2)
+        {
+            return QueueWorkItem<T1, T2> (action, arg1, arg2, SmartThreadPool.DefaultWorkItemPriority);
+        }
+
+        public IWorkItemResult QueueWorkItem<T1, T2> (Action<T1, T2> action, T1 arg1, T2 arg2, WorkItemPriority priority)
+        {
+            PreQueueWorkItem ();
+            WorkItem workItem = WorkItemFactory.CreateWorkItem (
+                this,
+                WIGStartInfo,
+                state =>
+                {
+                    action.Invoke (arg1, arg2);
+                    return null;
+                },
+                WIGStartInfo.FillStateWithArgs ? new object[] { arg1, arg2 } : null, priority);
+            Enqueue (workItem);
+            return workItem.GetWorkItemResult ();
+        }
+
+        public IWorkItemResult QueueWorkItem<T1, T2, T3>(Action<T1, T2, T3> action, T1 arg1, T2 arg2, T3 arg3)
+        {
+            return QueueWorkItem<T1, T2, T3> (action, arg1, arg2, arg3, SmartThreadPool.DefaultWorkItemPriority);
+            ;
+        }
+
+        public IWorkItemResult QueueWorkItem<T1, T2, T3> (Action<T1, T2, T3> action, T1 arg1, T2 arg2, T3 arg3, WorkItemPriority priority)
+        {
+            PreQueueWorkItem ();
+            WorkItem workItem = WorkItemFactory.CreateWorkItem (
+                this,
+                WIGStartInfo,
+                state =>
+                {
+                    action.Invoke (arg1, arg2, arg3);
+                    return null;
+                },
+                WIGStartInfo.FillStateWithArgs ? new object[] { arg1, arg2, arg3 } : null, priority);
+            Enqueue (workItem);
+            return workItem.GetWorkItemResult ();
+        }
+
+        public IWorkItemResult QueueWorkItem<T1, T2, T3, T4>(
+            Action<T1, T2, T3, T4> action, T1 arg1, T2 arg2, T3 arg3, T4 arg4)
+        {
+            return QueueWorkItem<T1, T2, T3, T4> (action, arg1, arg2, arg3, arg4,
+                                                  SmartThreadPool.DefaultWorkItemPriority);
+        }
+
+        public IWorkItemResult QueueWorkItem<T1, T2, T3, T4> (
+            Action<T1, T2, T3, T4> action, T1 arg1, T2 arg2, T3 arg3, T4 arg4, WorkItemPriority priority)
+        {
+            PreQueueWorkItem ();
+            WorkItem workItem = WorkItemFactory.CreateWorkItem (
+                           this,
+                           WIGStartInfo,
+                           state =>
+                           {
+                               action.Invoke (arg1, arg2, arg3, arg4);
+                               return null;
+                           },
+                           WIGStartInfo.FillStateWithArgs ? new object[] { arg1, arg2, arg3, arg4 } : null, priority);
+            Enqueue (workItem);
+            return workItem.GetWorkItemResult ();
+        }
+
+        #endregion
+
+        #region QueueWorkItem(Func<...>)
+
+        public IWorkItemResult<TResult> QueueWorkItem<TResult>(Func<TResult> func)
+        {
+            PreQueueWorkItem();
+            WorkItem workItem = WorkItemFactory.CreateWorkItem(
+                            this,
+                            WIGStartInfo,
+                            state =>
+                            {
+                                return func.Invoke();
+                            });
+            Enqueue(workItem);
+            return new WorkItemResultTWrapper<TResult>(workItem.GetWorkItemResult());
+        }
+
+        public IWorkItemResult<TResult> QueueWorkItem<T, TResult>(Func<T, TResult> func, T arg)
+        {
+            PreQueueWorkItem();
+            WorkItem workItem = WorkItemFactory.CreateWorkItem(
+                this,
+                WIGStartInfo,
+                state =>
+                {
+                    return func.Invoke(arg);
+                },
+                WIGStartInfo.FillStateWithArgs ? new object[] { arg } : null);
+            Enqueue(workItem);
+            return new WorkItemResultTWrapper<TResult>(workItem.GetWorkItemResult());
+        }
+
+        public IWorkItemResult<TResult> QueueWorkItem<T1, T2, TResult>(Func<T1, T2, TResult> func, T1 arg1, T2 arg2)
+        {
+            PreQueueWorkItem();
+            WorkItem workItem = WorkItemFactory.CreateWorkItem(
+                            this,
+                            WIGStartInfo,
+                            state =>
+                            {
+                                return func.Invoke(arg1, arg2);
+                            },
+                           WIGStartInfo.FillStateWithArgs ? new object[] { arg1, arg2 } : null);
+            Enqueue(workItem);
+            return new WorkItemResultTWrapper<TResult>(workItem.GetWorkItemResult());
+        }
+
+        public IWorkItemResult<TResult> QueueWorkItem<T1, T2, T3, TResult>(
+            Func<T1, T2, T3, TResult> func, T1 arg1, T2 arg2, T3 arg3)
+        {
+            PreQueueWorkItem();
+            WorkItem workItem = WorkItemFactory.CreateWorkItem(
+                            this,
+                            WIGStartInfo,
+                            state =>
+                            {
+                                return func.Invoke(arg1, arg2, arg3);
+                            },
+                           WIGStartInfo.FillStateWithArgs ? new object[] { arg1, arg2, arg3 } : null);
+            Enqueue(workItem);
+            return new WorkItemResultTWrapper<TResult>(workItem.GetWorkItemResult());
+        }
+
+        public IWorkItemResult<TResult> QueueWorkItem<T1, T2, T3, T4, TResult>(
+            Func<T1, T2, T3, T4, TResult> func, T1 arg1, T2 arg2, T3 arg3, T4 arg4)
+        {
+            PreQueueWorkItem();
+            WorkItem workItem = WorkItemFactory.CreateWorkItem(
+                            this,
+                            WIGStartInfo,
+                            state =>
+                            {
+                                return func.Invoke(arg1, arg2, arg3, arg4);
+                            },
+                           WIGStartInfo.FillStateWithArgs ? new object[] { arg1, arg2, arg3, arg4 } : null);
+            Enqueue(workItem);
+            return new WorkItemResultTWrapper<TResult>(workItem.GetWorkItemResult());
+        }
+
+        #endregion
+
+        #endregion
+    }
+}
\ No newline at end of file
diff --git a/ThirdParty/SmartThreadPool/WorkItemsQueue.cs b/ThirdParty/SmartThreadPool/WorkItemsQueue.cs
index af5af07..e0bc916 100644
--- a/ThirdParty/SmartThreadPool/WorkItemsQueue.cs
+++ b/ThirdParty/SmartThreadPool/WorkItemsQueue.cs
@@ -1,109 +1,151 @@
-// Ami Bar
-// amibar@gmail.com
-
 using System;
+using System.Collections.Generic;
 using System.Threading;
 
 namespace Amib.Threading.Internal
 {
-    #region WorkItemsQueue class
-
-    /// <summary>
-    /// WorkItemsQueue class.
-    /// </summary>
-    public class WorkItemsQueue : IDisposable
-    {
-        #region Member variables
-
-        /// <summary>
-        /// Waiters queue (implemented as stack).
-        /// </summary>
-        private WaiterEntry _headWaiterEntry = new WaiterEntry();
-
-        /// <summary>
-        /// Waiters count
-        /// </summary>
-        private int _waitersCount = 0;
-
-        /// <summary>
-        /// Work items queue
-        /// </summary>
-        private PriorityQueue _workItems = new PriorityQueue();
+        #region WorkItemsQueue class
+
+        /// <summary>
+        /// WorkItemsQueue class.
+        /// </summary>
+        public class WorkItemsQueue : IDisposable
+        {
+                #region Member variables
+
+                /// <summary>
+                /// Waiters queue (implemented as stack).
+                /// </summary>
+                private readonly WaiterEntry _headWaiterEntry = new WaiterEntry();
+
+                /// <summary>
+                /// Waiters count
+                /// </summary>
+                private int _waitersCount = 0;
+
+                /// <summary>
+                /// Work items queue
+                /// </summary>
+                private readonly PriorityQueue _workItems = new PriorityQueue();
 
         /// <summary>
         /// Indicate that work items are allowed to be queued
         /// </summary>
         private bool _isWorkItemsQueueActive = true;
 
-        /// <summary>
-        /// Each thread in the thread pool keeps its own waiter entry.
-        /// </summary>
-        [ThreadStatic]
-        private static WaiterEntry _waiterEntry;
 
-        /// <summary>
-        /// A flag that indicates if the WorkItemsQueue has been disposed.
-        /// </summary>
-        private bool _isDisposed = false;
+#if (WINDOWS_PHONE) 
+        private static readonly Dictionary<int, WaiterEntry> _waiterEntries = new Dictionary<int, WaiterEntry>();
+#elif (_WINDOWS_CE)
+        private static LocalDataStoreSlot _waiterEntrySlot = Thread.AllocateDataSlot();
+#else
 
-        #endregion
+        [ThreadStatic]
+        private static WaiterEntry _waiterEntry;
+#endif
 
-        #region Public properties
 
         /// <summary>
-        /// Returns the current number of work items in the queue
+        /// Each thread in the thread pool keeps its own waiter entry.
         /// </summary>
-        public int Count
+        private static WaiterEntry CurrentWaiterEntry
         {
+#if (WINDOWS_PHONE) 
             get
             {
-                lock(this)
+                lock (_waiterEntries)
                 {
-                    ValidateNotDisposed();
-                    return _workItems.Count;
+                    WaiterEntry waiterEntry;
+                    if (_waiterEntries.TryGetValue(Thread.CurrentThread.ManagedThreadId, out waiterEntry))
+                    {
+                        return waiterEntry;
+                    }
                 }
+                return null;
             }
-        }
-
-        /// <summary>
-        /// Returns the current number of waiters
-        /// </summary>
-        public int WaitersCount
-        {
-            get
+            set
             {
-                lock(this)
+                lock (_waiterEntries)
                 {
-                    ValidateNotDisposed();
-                    return _waitersCount;
+                    _waiterEntries[Thread.CurrentThread.ManagedThreadId] = value;
                 }
             }
+#elif (_WINDOWS_CE)
+            get
+            {
+                return Thread.GetData(_waiterEntrySlot) as WaiterEntry;
+            }
+            set
+            {
+                Thread.SetData(_waiterEntrySlot, value);
+            }
+#else
+            get
+            {
+                return _waiterEntry;
+            }
+            set
+            {
+                _waiterEntry = value;
+            }
+#endif
         }
 
+        /// <summary>
+                /// A flag that indicates if the WorkItemsQueue has been disposed.
+                /// </summary>
+        private bool _isDisposed = false;
 
-        #endregion
+                #endregion
 
-        #region Public methods
+                #region Public properties
 
         /// <summary>
-        /// Enqueue a work item to the queue.
+        /// Returns the current number of work items in the queue
         /// </summary>
-        public bool EnqueueWorkItem(WorkItem workItem)
-        {
-            // A work item cannot be null, since null is used in the
-            // WaitForWorkItem() method to indicate timeout or cancel
-            if (null == workItem)
-            {
-                throw new ArgumentNullException("workItem" , "workItem cannot be null");
-            }
+                public int Count
+                {
+                        get
+                        {
+                return _workItems.Count;
+                        }
+                }
+
+                /// <summary>
+                /// Returns the current number of waiters
+                /// </summary>
+                public int WaitersCount
+                {
+                        get
+                        {
+                                return _waitersCount;
+                        }
+                }
 
-            bool enqueue = true;
 
-            // First check if there is a waiter waiting for work item. During 
-            // the check, timed out waiters are ignored. If there is no 
-            // waiter then the work item is queued.
-            lock(this)
-            {
+        #endregion
+
+        #region Public methods
+
+                /// <summary>
+                /// Enqueue a work item to the queue.
+                /// </summary>
+                public bool EnqueueWorkItem(WorkItem workItem)
+                {
+                        // A work item cannot be null, since null is used in the
+                        // WaitForWorkItem() method to indicate timeout or cancel
+                        if (null == workItem)
+                        {
+                                throw new ArgumentNullException("workItem" , "workItem cannot be null");
+                        }
+
+                        bool enqueue = true;
+
+                        // First check if there is a waiter waiting for work item. During 
+                        // the check, timed out waiters are ignored. If there is no 
+                        // waiter then the work item is queued.
+                        lock(this)
+                        {
                 ValidateNotDisposed();
 
                 if (!_isWorkItemsQueueActive)
@@ -111,56 +153,55 @@ namespace Amib.Threading.Internal
                     return false;
                 }
 
-                while(_waitersCount > 0)
-                {
-                    // Dequeue a waiter.
-                    WaiterEntry waiterEntry = PopWaiter();
-
-                    // Signal the waiter. On success break the loop
-                    if (waiterEntry.Signal(workItem))
-                    {
-                        enqueue = false;
-                        break;
-                    }
-                }
-
-                if (enqueue)
-                {
-                    // Enqueue the work item
-                    _workItems.Enqueue(workItem);
-                }
-            }
+                                while(_waitersCount > 0)
+                                {
+                                        // Dequeue a waiter.
+                                        WaiterEntry waiterEntry = PopWaiter();
+
+                                        // Signal the waiter. On success break the loop
+                                        if (waiterEntry.Signal(workItem))
+                                        {
+                                                enqueue = false;
+                                                break;
+                                        }
+                                }
+
+                                if (enqueue)
+                                {
+                                        // Enqueue the work item
+                                        _workItems.Enqueue(workItem);
+                                }
+                        }
             return true;
-        }
-
-
-        /// <summary>
-        /// Waits for a work item or exits on timeout or cancel
-        /// </summary>
-        /// <param name="millisecondsTimeout">Timeout in milliseconds</param>
-        /// <param name="cancelEvent">Cancel wait handle</param>
-        /// <returns>Returns true if the resource was granted</returns>
-        public WorkItem DequeueWorkItem(
-            int millisecondsTimeout, 
-            WaitHandle cancelEvent)
-        {
-            /// This method cause the caller to wait for a work item.
-            /// If there is at least one waiting work item then the 
-            /// method returns immidiately with true.
-            /// 
-            /// If there are no waiting work items then the caller 
-            /// is queued between other waiters for a work item to arrive.
-            /// 
-            /// If a work item didn't come within millisecondsTimeout or 
-            /// the user canceled the wait by signaling the cancelEvent 
-            /// then the method returns false to indicate that the caller 
-            /// didn't get a work item.
-
-            WaiterEntry waiterEntry = null;
-            WorkItem workItem = null;
-
-            lock(this)
-            {
+                }
+
+
+                /// <summary>
+                /// Waits for a work item or exits on timeout or cancel
+                /// </summary>
+                /// <param name="millisecondsTimeout">Timeout in milliseconds</param>
+                /// <param name="cancelEvent">Cancel wait handle</param>
+                /// <returns>Returns true if the resource was granted</returns>
+                public WorkItem DequeueWorkItem(
+                        int millisecondsTimeout, 
+                        WaitHandle cancelEvent)
+                {
+                        // This method cause the caller to wait for a work item.
+                        // If there is at least one waiting work item then the 
+                        // method returns immidiately with it.
+                        // 
+                        // If there are no waiting work items then the caller 
+                        // is queued between other waiters for a work item to arrive.
+                        // 
+                        // If a work item didn't come within millisecondsTimeout or 
+                        // the user canceled the wait by signaling the cancelEvent 
+                        // then the method returns null to indicate that the caller 
+                        // didn't get a work item.
+
+                        WaiterEntry waiterEntry;
+                        WorkItem workItem = null;
+                    lock (this)
+                    {
                 ValidateNotDisposed();
 
                 // If there are waiting work items then take one and return.
@@ -169,80 +210,79 @@ namespace Amib.Threading.Internal
                     workItem = _workItems.Dequeue() as WorkItem;
                     return workItem;
                 }
-                    // No waiting work items ...
-                else
-                {
-                    // Get the wait entry for the waiters queue
-                    waiterEntry = GetThreadWaiterEntry();
-
-                    // Put the waiter with the other waiters
-                    PushWaiter(waiterEntry);
-                }
-            }
-
-            // Prepare array of wait handle for the WaitHandle.WaitAny()
-            WaitHandle [] waitHandles = new WaitHandle [] { 
-                                                                waiterEntry.WaitHandle, 
-                                                                cancelEvent };
-
-            // Wait for an available resource, cancel event, or timeout.
 
-            // During the wait we are supposes to exit the synchronization 
-            // domain. (Placing true as the third argument of the WaitAny())
-            // It just doesn't work, I don't know why, so I have lock(this) 
-            // statments insted of one.
-
-            int index = WaitHandle.WaitAny(
-                waitHandles,
-                millisecondsTimeout, 
-                true);
-
-            lock(this)
-            {
-                // success is true if it got a work item.
-                bool success = (0 == index);
-
-                // The timeout variable is used only for readability.
-                // (We treat cancel as timeout)
-                bool timeout = !success;
-
-                // On timeout update the waiterEntry that it is timed out
-                if (timeout)
-                {
-                    // The Timeout() fails if the waiter has already been signaled
-                    timeout = waiterEntry.Timeout();
-
-                    // On timeout remove the waiter from the queue.
-                    // Note that the complexity is O(1).
-                    if(timeout)
-                    {
-                        RemoveWaiter(waiterEntry, false);
-                    }
-
-                    // Again readability
-                    success = !timeout;
-                }
-
-                // On success return the work item
-                if (success)
-                {
-                    workItem = waiterEntry.WorkItem;
-
-                    if (null == workItem)
-                    {
-                        workItem = _workItems.Dequeue() as WorkItem;
-                    }
-                }
-            }
-            // On failure return null.
-            return workItem;
-        }
+                // No waiting work items ...
+
+                // Get the waiter entry for the waiters queue
+                waiterEntry = GetThreadWaiterEntry();
+
+                // Put the waiter with the other waiters
+                PushWaiter(waiterEntry);
+                    }
+
+                    // Prepare array of wait handle for the WaitHandle.WaitAny()
+            WaitHandle [] waitHandles = new WaitHandle[] { 
+                                                                                                                                waiterEntry.WaitHandle, 
+                                                                                                                                cancelEvent };
+
+                        // Wait for an available resource, cancel event, or timeout.
+
+                        // During the wait we are supposes to exit the synchronization 
+                        // domain. (Placing true as the third argument of the WaitAny())
+                        // It just doesn't work, I don't know why, so I have two lock(this) 
+                        // statments instead of one.
+
+            int index = STPEventWaitHandle.WaitAny(
+                                waitHandles,
+                                millisecondsTimeout, 
+                                true);
+
+                        lock(this)
+                        {
+                                // success is true if it got a work item.
+                                bool success = (0 == index);
+
+                                // The timeout variable is used only for readability.
+                                // (We treat cancel as timeout)
+                                bool timeout = !success;
+
+                                // On timeout update the waiterEntry that it is timed out
+                                if (timeout)
+                                {
+                                        // The Timeout() fails if the waiter has already been signaled
+                                        timeout = waiterEntry.Timeout();
+
+                                        // On timeout remove the waiter from the queue.
+                                        // Note that the complexity is O(1).
+                                        if(timeout)
+                                        {
+                                                RemoveWaiter(waiterEntry, false);
+                                        }
+
+                                        // Again readability
+                                        success = !timeout;
+                                }
+
+                                // On success return the work item
+                                if (success)
+                                {
+                                        workItem = waiterEntry.WorkItem;
+
+                                        if (null == workItem)
+                                        {
+                                                workItem = _workItems.Dequeue() as WorkItem;
+                                        }
+                                }
+                        }
+                        // On failure return null.
+                        return workItem;
+                }
 
         /// <summary>
         /// Cleanup the work items queue, hence no more work 
         /// items are allowed to be queue
         /// </summary>
-        protected virtual void Cleanup()
+        private void Cleanup()
         {
             lock(this)
             {
@@ -271,301 +311,312 @@ namespace Amib.Threading.Internal
                 // Tell the waiters that they were timed out.
                 // It won't signal them to exit, but to ignore their
                 // next work item.
-                while(_waitersCount > 0)
-                {
-                    WaiterEntry waiterEntry = PopWaiter();
-                    waiterEntry.Timeout();
-                }
+                                while(_waitersCount > 0)
+                                {
+                                        WaiterEntry waiterEntry = PopWaiter();
+                                        waiterEntry.Timeout();
+                                }
             }
         }
 
-        #endregion
-
-        #region Private methods
-
-        /// <summary>
-        /// Returns the WaiterEntry of the current thread
-        /// </summary>
-        /// <returns></returns>
-        /// In order to avoid creation and destuction of WaiterEntry
-        /// objects each thread has its own WaiterEntry object.
-        private WaiterEntry GetThreadWaiterEntry()
+        public object[] GetStates()
         {
-            if (null == _waiterEntry)
+            lock (this)
             {
-                _waiterEntry = new WaiterEntry();
+                object[] states = new object[_workItems.Count];
+                int i = 0;
+                foreach (WorkItem workItem in _workItems)
+                {
+                    states[i] = workItem.GetWorkItemResult().State;
+                    ++i;
+                }
+                return states;
             }
-            _waiterEntry.Reset();
-            return _waiterEntry;
         }
 
-        #region Waiters stack methods
-
-        /// <summary>
-        /// Push a new waiter into the waiter's stack
-        /// </summary>
-        /// <param name="newWaiterEntry">A waiter to put in the stack</param>
-        public void PushWaiter(WaiterEntry newWaiterEntry)
-        {
-            // Remove the waiter if it is already in the stack and 
-            // update waiter's count as needed
-            RemoveWaiter(newWaiterEntry, false);
-
-            // If the stack is empty then newWaiterEntry is the new head of the stack 
-            if (null == _headWaiterEntry._nextWaiterEntry)
-            {
-                _headWaiterEntry._nextWaiterEntry = newWaiterEntry;
-                newWaiterEntry._prevWaiterEntry = _headWaiterEntry;
-
-            }
-            // If the stack is not empty then put newWaiterEntry as the new head 
-            // of the stack.
-            else
-            {
-                // Save the old first waiter entry
-                WaiterEntry oldFirstWaiterEntry = _headWaiterEntry._nextWaiterEntry;
+                #endregion
+
+                #region Private methods
+
+                /// <summary>
+                /// Returns the WaiterEntry of the current thread
+                /// </summary>
+                /// <returns></returns>
+                /// In order to avoid creation and destuction of WaiterEntry
+                /// objects each thread has its own WaiterEntry object.
+                private static WaiterEntry GetThreadWaiterEntry()
+                {
+                        if (null == CurrentWaiterEntry)
+                        {
+                                CurrentWaiterEntry = new WaiterEntry();
+                        }
+                        CurrentWaiterEntry.Reset();
+                        return CurrentWaiterEntry;
+                }
+
+                #region Waiters stack methods
+
+                /// <summary>
+                /// Push a new waiter into the waiter's stack
+                /// </summary>
+                /// <param name="newWaiterEntry">A waiter to put in the stack</param>
+                public void PushWaiter(WaiterEntry newWaiterEntry)
+                {
+                        // Remove the waiter if it is already in the stack and 
+                        // update waiter's count as needed
+                        RemoveWaiter(newWaiterEntry, false);
+
+                        // If the stack is empty then newWaiterEntry is the new head of the stack 
+                        if (null == _headWaiterEntry._nextWaiterEntry)
+                        {
+                                _headWaiterEntry._nextWaiterEntry = newWaiterEntry;
+                                newWaiterEntry._prevWaiterEntry = _headWaiterEntry;
+
+                        }
+                        // If the stack is not empty then put newWaiterEntry as the new head 
+                        // of the stack.
+                        else
+                        {
+                                // Save the old first waiter entry
+                                WaiterEntry oldFirstWaiterEntry = _headWaiterEntry._nextWaiterEntry;
 
                 // Update the links
-                _headWaiterEntry._nextWaiterEntry = newWaiterEntry;
-                newWaiterEntry._nextWaiterEntry = oldFirstWaiterEntry;
-                newWaiterEntry._prevWaiterEntry = _headWaiterEntry;
-                oldFirstWaiterEntry._prevWaiterEntry = newWaiterEntry;
-            }
-
-            // Increment the number of waiters
-            ++_waitersCount;
-        }
-
-        /// <summary>
-        /// Pop a waiter from the waiter's stack
-        /// </summary>
-        /// <returns>Returns the first waiter in the stack</returns>
-        private WaiterEntry PopWaiter()
-        {
-            // Store the current stack head
-            WaiterEntry oldFirstWaiterEntry = _headWaiterEntry._nextWaiterEntry;
-
-            // Store the new stack head
-            WaiterEntry newHeadWaiterEntry = oldFirstWaiterEntry._nextWaiterEntry;
-
-            // Update the old stack head list links and decrement the number
-            // waiters.
-            RemoveWaiter(oldFirstWaiterEntry, true);
-
-            // Update the new stack head
-            _headWaiterEntry._nextWaiterEntry = newHeadWaiterEntry;
-            if (null != newHeadWaiterEntry)
-            {
-                newHeadWaiterEntry._prevWaiterEntry = _headWaiterEntry;
-            }
-
-            // Return the old stack head
-            return oldFirstWaiterEntry;
-        }
-
-        /// <summary>
-        /// Remove a waiter from the stack
-        /// </summary>
-        /// <param name="waiterEntry">A waiter entry to remove</param>
-        /// <param name="popDecrement">If true the waiter count is always decremented</param>
-        private void RemoveWaiter(WaiterEntry waiterEntry, bool popDecrement)
-        {
-            // Store the prev entry in the list
-            WaiterEntry prevWaiterEntry = waiterEntry._prevWaiterEntry;
-
-            // Store the next entry in the list
-            WaiterEntry nextWaiterEntry = waiterEntry._nextWaiterEntry;
-
-            // A flag to indicate if we need to decrement the waiters count.
-            // If we got here from PopWaiter then we must decrement.
-            // If we got here from PushWaiter then we decrement only if
-            // the waiter was already in the stack.
-            bool decrementCounter = popDecrement;
-
-            // Null the waiter's entry links
-            waiterEntry._prevWaiterEntry = null;
-            waiterEntry._nextWaiterEntry = null;
-
-            // If the waiter entry had a prev link then update it.
-            // It also means that the waiter is already in the list and we
-            // need to decrement the waiters count.
-            if (null != prevWaiterEntry)
-            {
-                prevWaiterEntry._nextWaiterEntry = nextWaiterEntry;
-                decrementCounter = true;
-            }
-
-            // If the waiter entry had a next link then update it.
-            // It also means that the waiter is already in the list and we
-            // need to decrement the waiters count.
-            if (null != nextWaiterEntry)
-            {
-                nextWaiterEntry._prevWaiterEntry = prevWaiterEntry;
-                decrementCounter = true;
-            }
-
-            // Decrement the waiters count if needed
-            if (decrementCounter)
-            {
-                --_waitersCount;
-            }
-        }
-
-        #endregion
-
-        #endregion
-
-        #region WaiterEntry class 
-
-        // A waiter entry in the _waiters queue.
-        public class WaiterEntry : IDisposable
-        {
-            #region Member variables
-
-            /// <summary>
-            /// Event to signal the waiter that it got the work item.
-            /// </summary>
-            private AutoResetEvent _waitHandle = new AutoResetEvent(false);
-
-            /// <summary>
-            /// Flag to know if this waiter already quited from the queue 
-            /// because of a timeout.
-            /// </summary>
-            private bool _isTimedout = false;
-
-            /// <summary>
-            /// Flag to know if the waiter was signaled and got a work item. 
-            /// </summary>
-            private bool _isSignaled = false;
+                                _headWaiterEntry._nextWaiterEntry = newWaiterEntry;
+                                newWaiterEntry._nextWaiterEntry = oldFirstWaiterEntry;
+                                newWaiterEntry._prevWaiterEntry = _headWaiterEntry;
+                                oldFirstWaiterEntry._prevWaiterEntry = newWaiterEntry;
+                        }
+
+                        // Increment the number of waiters
+                        ++_waitersCount;
+                }
+
+                /// <summary>
+                /// Pop a waiter from the waiter's stack
+                /// </summary>
+                /// <returns>Returns the first waiter in the stack</returns>
+                private WaiterEntry PopWaiter()
+                {
+                        // Store the current stack head
+                        WaiterEntry oldFirstWaiterEntry = _headWaiterEntry._nextWaiterEntry;
+
+                        // Store the new stack head
+                        WaiterEntry newHeadWaiterEntry = oldFirstWaiterEntry._nextWaiterEntry;
+
+                        // Update the old stack head list links and decrement the number
+                        // waiters.
+                        RemoveWaiter(oldFirstWaiterEntry, true);
+
+                        // Update the new stack head
+                        _headWaiterEntry._nextWaiterEntry = newHeadWaiterEntry;
+                        if (null != newHeadWaiterEntry)
+                        {
+                                newHeadWaiterEntry._prevWaiterEntry = _headWaiterEntry;
+                        }
+
+                        // Return the old stack head
+                        return oldFirstWaiterEntry;
+                }
+
+                /// <summary>
+                /// Remove a waiter from the stack
+                /// </summary>
+                /// <param name="waiterEntry">A waiter entry to remove</param>
+                /// <param name="popDecrement">If true the waiter count is always decremented</param>
+                private void RemoveWaiter(WaiterEntry waiterEntry, bool popDecrement)
+                {
+                        // Store the prev entry in the list
+                        WaiterEntry prevWaiterEntry = waiterEntry._prevWaiterEntry;
+
+                        // Store the next entry in the list
+                        WaiterEntry nextWaiterEntry = waiterEntry._nextWaiterEntry;
+
+                        // A flag to indicate if we need to decrement the waiters count.
+                        // If we got here from PopWaiter then we must decrement.
+                        // If we got here from PushWaiter then we decrement only if
+                        // the waiter was already in the stack.
+                        bool decrementCounter = popDecrement;
+
+                        // Null the waiter's entry links
+                        waiterEntry._prevWaiterEntry = null;
+                        waiterEntry._nextWaiterEntry = null;
+
+                        // If the waiter entry had a prev link then update it.
+                        // It also means that the waiter is already in the list and we
+                        // need to decrement the waiters count.
+                        if (null != prevWaiterEntry)
+                        {
+                                prevWaiterEntry._nextWaiterEntry = nextWaiterEntry;
+                                decrementCounter = true;
+                        }
+
+                        // If the waiter entry had a next link then update it.
+                        // It also means that the waiter is already in the list and we
+                        // need to decrement the waiters count.
+                        if (null != nextWaiterEntry)
+                        {
+                                nextWaiterEntry._prevWaiterEntry = prevWaiterEntry;
+                                decrementCounter = true;
+                        }
+
+                        // Decrement the waiters count if needed
+                        if (decrementCounter)
+                        {
+                                --_waitersCount;
+                        }
+                }
+
+                #endregion
+
+                #endregion
+
+                #region WaiterEntry class 
+
+                // A waiter entry in the _waiters queue.
+                public sealed class WaiterEntry : IDisposable
+                {
+                        #region Member variables
+
+                        /// <summary>
+                        /// Event to signal the waiter that it got the work item.
+                        /// </summary>
+                        //private AutoResetEvent _waitHandle = new AutoResetEvent(false);
+            private AutoResetEvent _waitHandle = EventWaitHandleFactory.CreateAutoResetEvent();
+
+                        /// <summary>
+                        /// Flag to know if this waiter already quited from the queue 
+                        /// because of a timeout.
+                        /// </summary>
+                        private bool _isTimedout = false;
+
+                        /// <summary>
+                        /// Flag to know if the waiter was signaled and got a work item. 
+                        /// </summary>
+                        private bool _isSignaled = false;
 
             /// <summary>
             /// A work item that passed directly to the waiter withou going 
             /// through the queue
             /// </summary>
-            private WorkItem _workItem = null;
+                        private WorkItem _workItem = null;
 
             private bool _isDisposed = false;
 
-            // Linked list members
-            internal WaiterEntry _nextWaiterEntry = null;
-            internal WaiterEntry _prevWaiterEntry = null;
-
-            #endregion
-
-            #region Construction
-
-            public WaiterEntry()
-            {
-                Reset();
-            }
-                        
-            #endregion
-
-            #region Public methods
-
-            public WaitHandle WaitHandle
-            {
-                get { return _waitHandle; }
-            }
-
-            public WorkItem WorkItem
-            {
-                get
-                {
-                    lock(this)
-                    {
-                        return _workItem;
-                    }
-                }
-            }
-
-            /// <summary>
-            /// Signal the waiter that it got a work item.
-            /// </summary>
-            /// <returns>Return true on success</returns>
-            /// The method fails if Timeout() preceded its call
-            public bool Signal(WorkItem workItem)
-            {
-                lock(this)
-                {
-                    if (!_isTimedout)
-                    {
-                        _workItem = workItem;
-                        _isSignaled = true;
-                        _waitHandle.Set();
-                        return true;
-                    }
-                }
-                return false;
-            }
-
-            /// <summary>
-            /// Mark the wait entry that it has been timed out
-            /// </summary>
-            /// <returns>Return true on success</returns>
-            /// The method fails if Signal() preceded its call
-            public bool Timeout()
-            {
-                lock(this)
+                        // Linked list members
+                        internal WaiterEntry _nextWaiterEntry = null;
+                        internal WaiterEntry _prevWaiterEntry = null;
+
+                        #endregion
+
+                        #region Construction
+
+                        public WaiterEntry()
+                        {
+                                Reset();
+                        }
+                                                
+                        #endregion
+
+                        #region Public methods
+
+                        public WaitHandle WaitHandle
+                        {
+                                get { return _waitHandle; }
+                        }
+
+                        public WorkItem WorkItem
+                        {
+                                get
+                                {
+                                        return _workItem;
+                                }
+                        }
+
+                        /// <summary>
+                        /// Signal the waiter that it got a work item.
+                        /// </summary>
+                        /// <returns>Return true on success</returns>
+                        /// The method fails if Timeout() preceded its call
+                        public bool Signal(WorkItem workItem)
+                        {
+                                lock(this)
+                                {
+                                        if (!_isTimedout)
+                                        {
+                                                _workItem = workItem;
+                                                _isSignaled = true;
+                                                _waitHandle.Set();
+                                                return true;
+                                        }
+                                }
+                                return false;
+                        }
+
+                        /// <summary>
+                        /// Mark the wait entry that it has been timed out
+                        /// </summary>
+                        /// <returns>Return true on success</returns>
+                        /// The method fails if Signal() preceded its call
+                        public bool Timeout()
+                        {
+                                lock(this)
+                                {
+                                        // Time out can happen only if the waiter wasn't marked as
+                                        // signaled
+                                        if (!_isSignaled)
+                                        {
+                                                // We don't remove the waiter from the queue, the DequeueWorkItem 
+                        // method skips _waiters that were timed out.
+                                                _isTimedout = true;
+                                                return true;
+                                        }
+                                }
+                                return false;
+                        }
+
+                        /// <summary>
+                        /// Reset the wait entry so it can be used again
+                        /// </summary>
+                        public void Reset()
+                        {
+                                _workItem = null;
+                                _isTimedout = false;
+                                _isSignaled = false;
+                                _waitHandle.Reset();
+                        }
+
+                        /// <summary>
+                        /// Free resources
+                        /// </summary>
+                        public void Close()
+                        {
+                                if (null != _waitHandle)
+                                {
+                                        _waitHandle.Close();
+                                        _waitHandle = null;
+                                }
+                        }
+
+                        #endregion
+
+                        #region IDisposable Members
+
+                        public void Dispose()
+                        {
+                lock (this)
                 {
-                    // Time out can happen only if the waiter wasn't marked as
-                    // signaled
-                    if (!_isSignaled)
+                    if (!_isDisposed)
                     {
-                        // We don't remove the waiter from the queue, the DequeueWorkItem 
-                        // method skips _waiters that were timed out.
-                        _isTimedout = true;
-                        return true;
+                        Close();
                     }
-                }
-                return false;
-            }
-
-            /// <summary>
-            /// Reset the wait entry so it can be used again
-            /// </summary>
-            public void Reset()
-            {
-                _workItem = null;
-                _isTimedout = false;
-                _isSignaled = false;
-                _waitHandle.Reset();
-            }
-
-            /// <summary>
-            /// Free resources
-            /// </summary>
-            public void Close()
-            {
-                if (null != _waitHandle)
-                {
-                    _waitHandle.Close();
-                    _waitHandle = null;
-                }
-            }
-
-            #endregion
-
-            #region IDisposable Members
-
-            public void Dispose()
-            {
-                if (!_isDisposed)
-                {
-                    Close();
                     _isDisposed = true;
                 }
             }
 
-            ~WaiterEntry()
-            {
-                Dispose();
-            }
+                        #endregion
+                }
 
-            #endregion
-        }
-
-        #endregion
+                #endregion
 
         #region IDisposable Members
 
@@ -574,14 +625,8 @@ namespace Amib.Threading.Internal
             if (!_isDisposed)
             {
                 Cleanup();
-                _isDisposed = true;
-                GC.SuppressFinalize(this);
             }
-        }
-
-        ~WorkItemsQueue()
-        {
-            Cleanup();
+            _isDisposed = true;
         }
 
         private void ValidateNotDisposed()
@@ -595,6 +640,6 @@ namespace Amib.Threading.Internal
         #endregion
     }
 
-    #endregion
+        #endregion
 }