diff --git a/src/OpenTK/OpenTK.csproj b/src/OpenTK/OpenTK.csproj
index e5379a18..eb92dc2b 100644
--- a/src/OpenTK/OpenTK.csproj
+++ b/src/OpenTK/OpenTK.csproj
@@ -224,9 +224,6 @@
     <Compile Include="Platform\Utilities.cs">
       <SubType>Code</SubType>
     </Compile>
-    <Compile Include="Platform\INativeGLWindow.cs">
-      <SubType>Code</SubType>
-    </Compile>
     <Compile Include="Platform\DesktopGraphicsContext.cs">
       <SubType>Code</SubType>
     </Compile>
diff --git a/src/OpenTK/Platform/INativeGLWindow.cs b/src/OpenTK/Platform/INativeGLWindow.cs
deleted file mode 100644
index 83f2ea0f..00000000
--- a/src/OpenTK/Platform/INativeGLWindow.cs
+++ /dev/null
@@ -1,48 +0,0 @@
-#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.
- */
-#endregion
-
-using System;
-using System.Collections.Generic;
-#if !MINIMAL
-using System.Drawing;
-#endif
-using System.Text;
-
-using OpenTK.Input;
-using OpenTK.Graphics;
-
-namespace OpenTK.Platform
-{
-    [Obsolete]
-    internal interface INativeGLWindow : IDisposable
-    {
-        void CreateWindow(int width, int height, GraphicsMode mode, int major, int minor, GraphicsContextFlags flags, out IGraphicsContext context);
-        void DestroyWindow();
-        void ProcessEvents();
-        Point PointToClient(Point point);
-        Point PointToScreen(Point point);
-
-        bool Exists { get; }
-        IWindowInfo WindowInfo { get; }
-
-        string Title { get; set; }
-        bool Visible { get; set; }
-        bool IsIdle { get; }
-        IInputDriver InputDriver { get; }
-        WindowState WindowState { get; set; }
-        WindowBorder WindowBorder { get; set; }
-
-        event CreateEvent Create;
-        event DestroyEvent Destroy;
-    }
-
-    [Obsolete]
-    internal delegate void CreateEvent(object sender, EventArgs e);
-    [Obsolete]
-    internal delegate void DestroyEvent(object sender, EventArgs e);
-}