这些是我的DispatcherTimer声明和方法:privateDispatcherTimerDishTimer;privateTimeSpanSpanTime;privatevoidInitTimer(){DishTimer=newDispatcherTimer();DishTimer.Interval=newTimeSpan(0,0,0,1);DishTimer.Tick+=TimerOnTick;}privatevoidTimerOnTick(objectsender,objecto){SpanTime=SpanTime.Add(DishTimer.Interval);Dura