public static void DrawFigureOnControl(Control control, AbstractFigure item) { Graphics gr = control.CreateGraphics(); // gr.Clear(Control.DefaultBackColor); Pen pen = new Pen(Color.Green, 3); ConsoleApp1.Point p = item as ConsoleApp1.Point; if (p != null) { gr.DrawEllipse(pen, p.X, p.Y, 10, 10); } }