protected override void OnPaint(PaintEventArgs e)
{
e.Graphics.SmoothingMode = SmoothingMode.HighQuality;
var rect = FillRectangle.RInflate(-1, -1);
e.Graphics.FillRectangle(Brushes.White, rect);
rect.Draw(e.Graphics, Pens.Black);
e.Graphics.FillRectangle(Fill.Brush(), rect.RInflate(-2, -2));
rect = StrokeRectangle.RInflate(-1, -1);
e.Graphics.FillRectangle(Brushes.White, rect);
rect.Draw(e.Graphics, Pens.Black);
e.Graphics.FillRectangle(Stroke.Brush(), rect.RInflate(-2, -2));
e.Graphics.DrawImage(SwapImage, SwapImageRectangle);
}