画花纹图案

using (Graphics g = this.CreateGraphics())
            {//画板
                g.FillRectangle(Brushes.White, this.ClientRectangle);//画板颜色
                //定义笔刷
                HatchBrush hb = new HatchBrush(HatchStyle.Wave, Color.White, Color.Green);
                //使用笔刷创建钢笔
                using (Pen pen = new Pen(hb, 10)) 
                    g.DrawRectangle(pen, 30, 30, 80, 80);//绘制矩形边框 
            }