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diff --git a/OpenSim/Tests/Region/ScriptEngine/Shared/LSL_TypesTestList.cs b/OpenSim/Tests/Region/ScriptEngine/Shared/LSL_TypesTestList.cs
new file mode 100644
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+++ b/OpenSim/Tests/Region/ScriptEngine/Shared/LSL_TypesTestList.cs
@@ -0,0 +1,162 @@
+/*
+ * Copyright (c) Contributors, http://opensimulator.org/
+ * See CONTRIBUTORS.TXT for a full list of copyright holders.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in the
+ *       documentation and/or other materials provided with the distribution.
+ *     * Neither the name of the OpenSim Project nor the
+ *       names of its contributors may be used to endorse or promote products
+ *       derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+using System.Collections.Generic;
+using NUnit.Framework;
+using OpenSim.Tests.Common;
+using OpenSim.Region.ScriptEngine.Shared;
+
+namespace OpenSim.Region.ScriptEngine.Shared.Tests
+{
+    /// <summary>
+    /// Tests the LSL_Types.list class.
+    /// </summary>
+    [TestFixture]
+    public class LSL_TypesTestList
+    {
+        /// <summary>
+        /// Tests concatenating a string to a list.
+        /// </summary>
+        [Test]
+        public void TestConcatenateString()
+        {
+            LSL_Types.list testList = new LSL_Types.list(1, 'a', "test");
+            testList += "addition";
+
+            Assert.AreEqual(4, testList.Length);
+            Assert.AreEqual("addition", testList.Data[3]);
+            Assert.AreEqual(typeof(System.String), testList.Data[3].GetType());
+
+            LSL_Types.list secondTestList = testList + "more";
+
+            Assert.AreEqual(5, secondTestList.Length);
+            Assert.AreEqual("more", secondTestList.Data[4]);
+            Assert.AreEqual(typeof(System.String), secondTestList.Data[4].GetType());
+        }
+
+        /// <summary>
+        /// Tests concatenating an integer to a list.
+        /// </summary>
+        [Test]
+        public void TestConcatenateInteger()
+        {
+            LSL_Types.list testList = new LSL_Types.list(1, 'a', "test");
+            testList += 20;
+
+            Assert.AreEqual(4, testList.Length);
+            Assert.AreEqual(20, testList.Data[3]);
+            Assert.AreEqual(typeof(int), testList.Data[3].GetType());
+
+            LSL_Types.list secondTestList = testList + 2;
+
+            Assert.AreEqual(5, secondTestList.Length);
+            Assert.AreEqual(2, secondTestList.Data[4]);
+            Assert.AreEqual(typeof(int), secondTestList.Data[4].GetType());
+        }
+
+        /// <summary>
+        /// Tests concatenating a double to a list.
+        /// </summary>
+        [Test]
+        public void TestConcatenateDouble()
+        {
+          LSL_Types.list testList = new LSL_Types.list(1, 'a', "test");
+          testList += 2.0;
+
+          Assert.AreEqual(4, testList.Length);
+          Assert.AreEqual(2.0, testList.Data[3]);
+          Assert.AreEqual(typeof(double), testList.Data[3].GetType());
+
+          LSL_Types.list secondTestList = testList + 0.04;
+
+          Assert.AreEqual(5, secondTestList.Length);
+          Assert.AreEqual(0.04, secondTestList.Data[4]);
+          Assert.AreEqual(typeof(double), secondTestList.Data[4].GetType());
+        }
+
+        /// <summary>
+        /// Tests casting LSLInteger item to LSLInteger.
+        /// </summary>
+        [Test]
+        public void TestCastLSLIntegerItemToLSLInteger()
+        {
+          LSL_Types.LSLInteger testValue = new LSL_Types.LSLInteger(123);
+          LSL_Types.list testList = new LSL_Types.list(testValue);
+
+          Assert.AreEqual(testValue, (LSL_Types.LSLInteger)testList.Data[0]);
+        }
+
+        /// <summary>
+        /// Tests casting LSLFloat item to LSLFloat.
+        /// </summary>
+        [Test]
+        public void TestCastLSLFloatItemToLSLFloat()
+        {
+          LSL_Types.LSLFloat testValue = new LSL_Types.LSLFloat(123.45678987);
+          LSL_Types.list testList = new LSL_Types.list(testValue);
+
+          Assert.AreEqual(testValue, (LSL_Types.LSLFloat)testList.Data[0]);
+        }
+
+        /// <summary>
+        /// Tests casting LSLString item to LSLString.
+        /// </summary>
+        [Test]
+        public void TestCastLSLStringItemToLSLString()
+        {
+          LSL_Types.LSLString testValue = new LSL_Types.LSLString("hello there");
+          LSL_Types.list testList = new LSL_Types.list(testValue);
+
+          Assert.AreEqual(testValue, (LSL_Types.LSLString)testList.Data[0]);
+        }
+
+        /// <summary>
+        /// Tests casting Vector3 item to Vector3.
+        /// </summary>
+        [Test]
+        public void TestCastVector3ItemToVector3()
+        {
+          LSL_Types.Vector3 testValue = new LSL_Types.Vector3(12.34, 56.987654, 0.00987);
+          LSL_Types.list testList = new LSL_Types.list(testValue);
+
+          Assert.AreEqual(testValue, (LSL_Types.Vector3)testList.Data[0]);
+        }
+        /// <summary>
+        /// Tests casting Quaternion item to Quaternion.
+        /// </summary>
+        [Test]
+        public void TestCastQuaternionItemToQuaternion()
+        {
+          LSL_Types.Quaternion testValue = new LSL_Types.Quaternion(12.34, 56.44323, 765.983421, 0.00987);
+          LSL_Types.list testList = new LSL_Types.list(testValue);
+
+          Assert.AreEqual(testValue, (LSL_Types.Quaternion)testList.Data[0]);
+        }
+
+
+    }
+}