protected async override void OnNavigatedTo(NavigationEventArgs e) { _viewModel = this.DataContext as MainPageViewModel; _cameraService = new CameraCaptureService(); _recognitionService = new FaceRecognitionService(subscriptionKey, faceEndpoint); _imageFolder = await ApplicationData.Current.LocalFolder.CreateFolderAsync("ProfilePhotoFolder", CreationCollisionOption.OpenIfExists); }