c#鼠标移动到Button 改变颜色

private void button1_MouseMove(object sender, MouseEventArgs e)
{
     button1.BackColor = Color.Blue;
}
private void button1_MouseLeave(object sender, EventArgs e)
{
    button1.BackColor = Color.White;
}  
MouseMove和MouseLeave和配合使用，不然鼠标离开之后就变不回原色了。