我在Windows服务中使用System.Threading.Timer定期执行一个方法。定时器只触发一次，它不会触发。谁能帮忙。下面是代码privateTimerCallbacktimerDelegate;protectedoverridevoidOnStart(string[]args){timerDelegate=newTimerCallback(DoWork);serviceTimer=newTimer(timerDelegate,null,1000,Timeout.Infinite);}privatevoidDoWork(objectstate){GetMessages();