winfrom 绘制圆形按钮

private void Button_Paint(object sender, PaintEventArgs e)
{
    Button btn = sender as Button;
    System.Drawing.Drawing2D.GraphicsPath btnPath = new System.Drawing.Drawing2D.GraphicsPath();
    System.Drawing.Rectangle newRectangle = btn.ClientRectangle;
    newRectangle.Inflate(-1, -1);
    e.Graphics.DrawEllipse(System.Drawing.Pens.BlanchedAlmond, newRectangle);
    newRectangle.Inflate(-1, -1);
    btnPath.AddEllipse(newRectangle);
    btn.Region = new System.Drawing.Region(btnPath);
}

使用按钮的Paint事件