C#winform去除btn按钮的边框

系统自带的按钮无法去除边框。网上找了个解决方案：

重写按钮的OnPaint事件

    class newbtn : System.Windows.Forms.Button //继承之系统按钮控件  
    {
        protected override void OnPaint(PaintEventArgs e)
        {//重写

            base.OnPaint(e);
            System.Drawing.Pen pen = new Pen(this.BackColor, 3);
            e.Graphics.DrawRectangle(pen, 0, 0, this.Width, this.Height);//填充
            pen.Dispose();

        }
    }

然后将designer。cs文件中你要修改的按钮重新继承至newbtn就可。