FastColoredTextBoxNS.ExpandFoldingMarker.Draw C# (CSharp) Method

        public override void Draw(Graphics gr, Pen pen)
        {
            //draw plus
            gr.FillRectangle(Brushes.White, rectangle);
            gr.DrawRectangle(pen, rectangle);
            gr.DrawLine(Pens.Red, rectangle.Left + 2, rectangle.Top + rectangle.Height/2, rectangle.Right - 2,
                rectangle.Top + rectangle.Height/2);
            gr.DrawLine(Pens.Red, rectangle.Left + rectangle.Width/2, rectangle.Top + 2,
                rectangle.Left + rectangle.Width/2, rectangle.Bottom - 2);
        }