Button MouseEvent颜色变化

  public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();

            this.button1.Enter += button_Enter;
            this.button1.Leave += button_Leave;

            this.button2.Enter += button_Enter;
            this.button2.Leave += button_Leave;

            //继续写其他的
        }

        void button_Leave(object sender, EventArgs e)
        {
            (sender as Button).BackColor = SystemColors.Control;
        }

        void button_Enter(object sender, EventArgs e)
        {
            (sender as Button).BackColor = Color.Red;
        }
    }

//给每个按钮全部订阅一样的点击事件
button1.Click += button_Click;
button2.Click += button_Click;
button3.Click += button_Click;

private void button_Click(object sender, EventArgs e)
{
    Button[] btnArr = { button1, button2,button3 };
    Button btn = sender as Button;//当前按钮
    btn.BackgroundImage = Resource1.backImg1;//将当前按钮背景设为backImg1，Resource1是资源文件类名
    //剩下的除当前按钮外，全部设另一个背景
    Array.ForEach(btnArr.Where(p => p != btn).ToArray(), p => p.BackgroundImage = Resource1.backImg2);
}