Moved ContextHandle to its own class.

Source/OpenTK/GLContext.cs

@@ -324,64 +324,4 @@ namespace OpenTK
 
         #endregion
     }
-}
-
-internal class ContextHandle : /*System.Runtime.InteropServices.SafeHandle,*/ IComparable<ContextHandle>
-{
-    IntPtr handle;
-    public IntPtr Handle { get { return handle; } }
-
-    public ContextHandle() /*: base(IntPtr.Zero, true)*/ { }
-    public ContextHandle(IntPtr h) { handle = h; }
-
-    #region IComparable<ContextHandle> Members
-
-    public int CompareTo(ContextHandle other)
-    {
-        unsafe { return (int)((int*)other.handle.ToPointer() - (int*)this.handle.ToPointer()); }
-    }
-
-    #endregion
-
-    public override string ToString()
-    {
-        return Handle.ToString();
-    }
-
-    public override bool Equals(object obj)
-    {
-        if (obj is ContextHandle)
-            return this.Handle == ((ContextHandle)obj).Handle;
-        return false;
-    }
-
-    public override int GetHashCode()
-    {
-        return Handle.GetHashCode();
-    }
-
-    /*
-    public override bool IsInvalid
-    {
-        get { return handle == IntPtr.Zero; }
-    }
-
-    protected override bool ReleaseHandle()
-    {
-        throw new NotImplementedException();
-    }
-    */
-
-    public static implicit operator IntPtr(ContextHandle c)
-    {
-        return c.handle;
-    }
-
-    public static implicit operator ContextHandle(IntPtr p)
-    {
-        return new ContextHandle(p);
-    }
-
-
-
-}
+}