C# 绘制窗体边框（Form_Paint事件）

 private void frmBase_Paint(object sender, PaintEventArgs e)
 {
     this.DrawFormBorder(e.Graphics);
 }

        /// <summary>
        /// 绘制窗体边框
        /// </summary>
        /// <param name="g"></param>
        protected void DrawFormBorder(Graphics g)
        {
            ControlPaint.DrawBorder(g, this.ClientRectangle,
                Color.Black, 1, ButtonBorderStyle.Solid, //左边
                Color.Black, 1, ButtonBorderStyle.Solid, //上边
                Color.Black, 1, ButtonBorderStyle.Solid, //右边
                Color.Black, 1, ButtonBorderStyle.Solid);//底边
        }