private void InitializeTroubleCode() { troubleCodeView = new TroubleCodeView(); troubleCodeView.DataContext = AppPresenter.Inst.TCPresenter; AppPresenter.Inst.TCPresenter.BackHandler = () => { Dispatcher.BeginInvoke((Action)(() => { Content = menuView; })); }; AppPresenter.Inst.TCPresenter.ShowHandler = () => { Dispatcher.BeginInvoke((Action)(() => { Content = troubleCodeView; })); }; }