Graphics

 System.Drawing.Pen myPen = new System.Drawing.Pen(System.Drawing.Color.Red);//画笔
            system.drawing.solidbrush mybrush = new system.drawing.solidbrush(system.drawing.color.red);//画刷
            system.drawing.graphics formgraphics = this.creategraphics();
            formgraphics.fillellipse(mybrush, new rectangle(0, 0, 100, 200));//画实心椭圆
            formgraphics.drawellipse(mypen, new rectangle(0, 0, 100, 200));//空心圆
            formgraphics.fillrectangle(mybrush, new rectangle(0, 0, 100, 200));//画实心方
            formgraphics.drawrectangle(mypen, new rectangle(0, 0, 100, 200));//空心矩形
            formgraphics.drawline(mypen, 0, 0, 200, 200);//画线
            formgraphics.drawpie(mypen, 90, 80, 140, 40, 120, 100); //画馅饼图形
            画多边形
            formgraphics.drawpolygon(mypen, new point[]{
                new point(30,140),
                new point(270,250),
                new point(110,240),
                new point (200,170),
                new point(70,350),
                new point(50,200)
            });
            清理使用的资源
            mypen.dispose();
            mybrush.dispose();
            formgraphics.dispose();