public void ChangeMode()
        {
            if (mode == Graphics.TwoDimension)
            {
                mode = Graphics.ThreeDimension;
            }
            else
            {
                mode = Graphics.TwoDimension;
            }

            if (GraphicsChanged != null)
            {
                GraphicsChanged.Raise();
            }
        }
 private void Repaint(Rectangle rect)
 {
     GraphicsChanged?.Invoke(this, new UpdateGraphicsEventArgs {
         DamageRect = rect
     });
 }