C#winform的button按钮状态切换问题

Question

窗体中我做了32个按钮，如何实现点击任意一个按钮，本按钮变色，其余按钮恢复成初始状态的颜色

Answer 1

 foreach (Button btn in this.Controls.OfType<Button>())
{
if (btn != sender)
btn.BackColor = System.Drawing.SystemColors.Control; 
else
btn.BackColor = Color.Red;
}