public static void ForceRedraw(this OpenGLControl openGLControl)
{
MethodInfo methodInfo = openGLControl.GetType().GetMethod("UpdateOpenGLControl", BindingFlags.NonPublic | BindingFlags.Instance);
methodInfo.Invoke(openGLControl, new object[] { (int)openGLControl.ActualWidth, (int)openGLControl.ActualHeight });
}