winfrom 点击按钮button弹框显示颜色集

1.窗体托一个按钮button；

2.单击事件：

  private void btnForeColor_Click(object sender, EventArgs e)
         {
             using (ColorDialog cdialog = new ColorDialog())
             {
                 cdialog.AnyColor = true;
                 if (cdialog.ShowDialog() == DialogResult.OK)
                 {
                     this.ForeColor = cdialog.Color;
                     this.btnForeColor.BackColor = this.ForeColor;
                 }
             }
         }