程序代码：

private void button1_Click(object sender, EventArgs e)
        {
            button1.BackColor = button1.BackColor == Color.CornflowerBlue ? Color.Red : Color.CornflowerBlue;
        ｝//这里是来回切换，你要用你自己的逻辑，关键就是设置背景色BackColor就可以了