/* Create a new graphics-ready top-level window */
 public GraphicsWindow(string title, int width, int height)
 {
     _window = new PlatformWindow(title, width, height);
     CreateFromWindowHandle(IntPtr.Zero, _window.Handle);
     _window.Resize += new EventHandler(OnResize);
 }
 public override void Dispose()
 {
     base.Dispose();
     if (_window != null)
     {
         _window.Dispose();
         _window = null;
     }
 }