C# Winform圆形窗体

  private void form1_Paint(object sender, PaintEventArgs e)
        {
            #region 圆形窗体
            System.Drawing.Drawing2D.GraphicsPath path = new System.Drawing.Drawing2D.GraphicsPath();//创建一条线
            path.AddEllipse(0, 0, Width, Height);//画一个椭圆 （x,y,宽,高）
            Graphics g = CreateGraphics();//为窗体创建画布
            g.DrawEllipse(new Pen(Color.Black, 2), 1, 1, Width - 2, Height - 2);//为画布画一个椭圆(笔,x,y，宽,高)
            Region = new Region(path);//设置控件的窗口区域
            #endregion
        }