timer2.Interval = 1000;//时间间隔
timer2.Start();//开始
timer2.Stop();//结束
private void timer1_Tick(object sender, EventArgs e)//每次运行
timer2.Interval = 1000;//时间间隔
timer2.Start();//开始
timer2.Stop();//结束
private void timer1_Tick(object sender, EventArgs e)//每次运行