ImageGlass.ImageBox.DrawDropShadow C# (CSharp) Method

        protected virtual void DrawDropShadow(Graphics g, Rectangle viewPort)
        {
            Rectangle rightEdge;
            Rectangle bottomEdge;

            rightEdge = new Rectangle(viewPort.Right + 1, viewPort.Top + DropShadowSize, DropShadowSize, viewPort.Height);
            bottomEdge = new Rectangle(viewPort.Left + DropShadowSize, viewPort.Bottom + 1, viewPort.Width + 1, DropShadowSize);

            using (Brush brush = new SolidBrush(ImageBorderColor))
            {
                g.FillRectangles(brush, new[]
                                {
                                  rightEdge, bottomEdge
                                });
            }
        }