private async Task CreateRootFrame(LaunchActivatedEventArgs e) { Frame rootFrame = Window.Current.Content as Frame; // Do not repeat app initialization when the Window already has content, // just ensure that the window is active if (rootFrame == null) { // Create a Frame to act as the navigation context and navigate to the first page rootFrame = new Frame(); // TODO: change this value to a cache size that is appropriate for your application rootFrame.CacheSize = 1; if (e.PreviousExecutionState == ApplicationExecutionState.Terminated) { // TODO: Load state from previously suspended application } // Place the frame in the current Window Window.Current.Content = rootFrame; } if (rootFrame.Content == null) { Type typeOfFirstPage = string.IsNullOrWhiteSpace(SettingsViewModel.Current.MobileServicesUserId) ? typeof(SplashPage) : await NavigationHelper.DetermineFirstPage(); // If arguments have been passed, e.g. from an NFC tag, then navigate to the appropriate page. // Set up pages, like create/select baby, take precedence over NFC activation // but we still need to remember follow the NFC activation once set up is complete by passing // the existing navigation arguments if (typeOfFirstPage == typeof(MainPage)) { typeOfFirstPage = NavigationHelper.DeterminePageFromNavigationArguments(e.Arguments); } #if WINDOWS_PHONE_APP // Removes the turnstile navigation for startup. if (rootFrame.ContentTransitions != null) { this.transitions = new TransitionCollection(); foreach (var c in rootFrame.ContentTransitions) { this.transitions.Add(c); } } rootFrame.ContentTransitions = null; rootFrame.Navigated += this.RootFrame_FirstNavigated; #endif // When the navigation stack isn't restored navigate to the first page, // configuring the new page by passing required information as a navigation // parameter if (!rootFrame.Navigate(typeOfFirstPage, e.Arguments)) { throw new Exception("Failed to create initial page"); } } }