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;
                }
            }
        }