//开始事件         protected override void OnStart(string[] args)         {              //定时事件             MyTimer();         }         //结束事件         protected override void OnStop()         {             writeLog("服务结束时间："  + DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss"));         }         //实例化System.Timers.Timer           private void MyTimer()         {             System.Timers.Timer MT = new System.Timers.Timer(30000);             MT.Elapsed += new System.Timers.ElapsedEventHandler(MTimedEvent);             MT.Enabled = true;         }         //构造System.Timers.Timer实例   间隔时间事件           private void MTimedEvent(object source, System.Timers.ElapsedEventArgs e)         {             //实现方法         }