FastColoredTextBoxNS.MarkerStyle.Draw C# (CSharp) Method

        public override void Draw(Graphics gr, Point position, Range range)
        {
            //draw background
            if (BackgroundBrush != null)
            {
                Rectangle rect = new Rectangle(position.X, position.Y, (range.End.iChar - range.Start.iChar) * range.tb.CharWidth, range.tb.CharHeight);
                if (rect.Width == 0)
                    return;
                gr.FillRectangle(BackgroundBrush, rect);
            }
        }