Print useful information in ToString() method.

Updated license text.

Source/OpenTK/Graphics/GraphicsContext.cs

@@ -1,9 +1,28 @@
-#region --- License ---
-/* Licensed under the MIT/X11 license.
- * Copyright (c) 2006-2008 the OpenTK Team.
- * This notice may not be removed from any source distribution.
- * See license.txt for licensing detailed licensing details.
- */
+#region License
+//
+// The Open Toolkit Library License
+//
+// Copyright (c) 2006 - 2010 the Open Toolkit library.
+//
+// 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;
@@ -190,6 +209,39 @@ namespace OpenTK.Graphics
 
         #endregion
 
+        #region Public Members
+
+        /// <summary>
+        /// Returns a <see cref="System.String"/> representing this instance.
+        /// </summary>
+        /// <returns>A <see cref="System.String"/>  that contains a string representation of this instance.</returns>
+        public override string ToString()
+        {
+            return (this as IGraphicsContextInternal).Context.ToString();
+        }
+
+        /// <summary>
+        /// Returns the hash code for this instance.
+        /// </summary>
+        /// <returns>A System.Int32 with the hash code of this instance.</returns>
+        public override int GetHashCode()
+        {
+            return (this as IGraphicsContextInternal).Context.GetHashCode();
+        }
+
+        /// <summary>
+        /// Compares two instances.
+        /// </summary>
+        /// <param name="obj">The instance to compare to.</param>
+        /// <returns>True, if obj is equal to this instance; false otherwise.</returns>
+        public override bool Equals(object obj)
+        {
+            return (obj is GraphicsContext) &&
+                (this as IGraphicsContextInternal).Context == (obj as IGraphicsContextInternal).Context;
+        }
+
+        #endregion
+
         #region Private Members
 
         static IGraphicsContext FindSharedContext()