/// <summary>
/// Disposes the osd controller
/// </summary>
public void Dispose()
{
_fullscreenWindow.CompleteDispose();
_dialogWindow.Dispose();
_videoOSDWindow.Dispose();
_osdForm.Dispose();
GUIGraphicsContext.form.SizeChanged -= parent_SizeChanged;
ImageCache.Dispose();
singleton = null;
}
