NullReferenceException: 未将对象引用设置到对象的实例。
StackTrace:
   在 Quicker.Domain.Services.NotifyService.RunOnUiThread(Boolean waitToComplete, Action action, DispatcherPriority priority)
   在 Quicker.Domain.AppServer.<>c.<.ctor>b__15_0(Object sender, ForegroundWindowChangedEventArgs args)
   在 Quicker.Modules.ActiveWindow.ForegroundWindowWatcher.CheckNewForegroundWindow(HWND hwnd)
   在 Quicker.Modules.ActiveWindow.ForegroundWindowWatcher.DoCheckForegroundChange()
   在 System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
   在 System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
   在 System.Threading.TimerQueueTimer.CallCallback()
   在 System.Threading.TimerQueueTimer.Fire()
   在 System.Threading.TimerQueue.FireNextTimers()