C# How can I delete things which I drew with GDI+

Question

HI How can I delete things which I drew with GDI, I mean for instance, a rectangle. It is killing me, I have tried every thing and I've got nothing. I can do it with Graphics.Clear(SomeColor) because it will mess up my background, I want just get rid of things that I drew. I’m using following code to draw rectangle: Graphics gfx = this.tabControlPanel3.CreateGraphics(); Rectangle rc = new Rectangle(10,20,100,200); gfx.SmoothingMode = SmoothingMode.AntiAlias; Pen pen = new Pen(Brushes.Red,3); gfx.DrawRectangle(pen,rc); I want to delete this rectangle from my Form after pressing a button. Please help me, I can’t sleep because of it :)))))