Added multithreading test to verify GameWindow behavior with multiple threads.

Source/Examples/OpenTK/Test/Multithreading.cs

@@ -0,0 +1,66 @@
+#region License
+//
+// The Open Toolkit Library License
+//
+// Copyright (c) 2006 - 2009 the Open Toolkit library, except where noted.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights to 
+// use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+// the Software, and to permit persons to whom the Software is furnished to do
+// so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in all
+// copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+// OTHER DEALINGS IN THE SOFTWARE.
+//
+#endregion
+
+using System;
+using System.Collections.Generic;
+using System.Text;
+using System.Threading;
+
+namespace Examples.Tests
+{
+    [Example("Multithreading Test", ExampleCategory.OpenTK, "Test")]
+    class Multithreading
+    {
+        public static void Main()
+        {
+            const int ThreadCount = 4;
+            List<Thread> threads = new List<Thread>();
+
+            // launch threads
+            for (int i = 0; i < ThreadCount; i++)
+            {
+                Thread t = new Thread(delegate()
+                    {
+                        using (Tutorial.T03_Immediate_Mode_Cube game = new Examples.Tutorial.T03_Immediate_Mode_Cube())
+                        {
+                            game.Run(30.0);
+                        }
+                    });
+                t.IsBackground = true;
+                t.Priority = ThreadPriority.BelowNormal;
+                t.Start();
+                threads.Add(t);
+            }
+
+            // wait for exit
+            foreach (Thread t in threads)
+            {
+                t.Join();
+            }
+        }
+    }
+}