WPF DispatcherTimer GC回收

         static DispatcherTimer GCTimer = new DispatcherTimer();
         public static void BeginGC()
         {
             GCTimer.Interval = TimeSpan.FromMinutes(0.5); //垃圾释放定时器 我定为每十分钟释放一次，大家可根据需要修改
             GCTimer.Start();

             EventsRegistion();    // 注册事件
         }

         public static void EventsRegistion()
         {
             GCTimer.Tick += new EventHandler(OnGarbageCollection);
         }

         public static void EventDeregistration()
         {
             GCTimer.Tick -= new EventHandler(OnGarbageCollection);
         }

         static void OnGarbageCollection(object sender, EventArgs e)
         {
             GC.Collect();
             GC.WaitForPendingFinalizers();
             GC.Collect();
         }