Alsing.Drawing.DrawingTools.DrawSunkenOuterBorder C# (CSharp) Method

        private static void DrawSunkenOuterBorder(Graphics g, Brush dark, Rectangle r, Brush light) {

            g.FillRectangle(dark, r.Left, r.Top, r.Width, 1);
            g.FillRectangle(dark, r.Left, r.Top, 1, r.Height);

            g.FillRectangle(light, r.Right - 1, r.Top + 1, 1, r.Height - 1);
            g.FillRectangle(light, r.Left + 1, r.Bottom - 1, r.Width - 1, 1);
        }