Added DummyGLContext.cs amd DummyGLControl.cs drivers.

Source/OpenTK/Platform/DummyGLContext.cs

@@ -0,0 +1,42 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace OpenTK.Platform
+{
+    /// <summary>
+    /// A dummy GLContext to be used inside the Visual Studio designer.
+    /// </summary>
+    internal class DummyGLContext : IGLContext
+    {
+        #region --- IGLContext Members ---
+
+        public void SwapBuffers()
+        {
+        }
+
+        public void MakeCurrent()
+        {
+        }
+
+        public IntPtr GetAddress(string function)
+        {
+            return IntPtr.Zero;
+        }
+
+        public IEnumerable<DisplayMode> GetDisplayModes()
+        {
+            throw new Exception("The method or operation is not implemented.");
+        }
+
+        #endregion
+
+        #region --- IDisposable Members ---
+
+        public void Dispose()
+        {
+        }
+
+        #endregion
+    }
+}

Source/OpenTK/Platform/DummyGLControl.cs

@@ -0,0 +1,47 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace OpenTK.Platform
+{
+    /// <summary>
+    /// A dummy GLControl to be used inside the Visual Studio designer.
+    /// </summary>
+    internal class DummyGLControl : IGLControl
+    {
+        bool fullscreen;
+        IGLContext glContext = new DummyGLContext();
+
+        #region --- IGLControl Members ---
+
+        public bool IsIdle
+        {
+            get
+            {
+                return false;
+            }
+        }
+
+        public bool Fullscreen
+        {
+            get
+            {
+                return fullscreen;
+            }
+            set
+            {
+                fullscreen = value;
+            }
+        }
+
+        public IGLContext Context
+        {
+            get
+            {
+                return glContext;
+            }
+        }
+
+        #endregion
+    }
+}