private async void TakePicture_Click(object sender, RoutedEventArgs e) { if (currentPerson == null) { Debug.WriteLine("Creating person in group."); var userData = new UserData(App.Settings.Values["userID"].ToString(), App.Settings.Values["Token"].ToString()); var id = await FaceApiService.CreatePersonInGroupAsync(personGroupId, viewModel.UserName, userData); Debug.WriteLine("Person created with ID: " + id); currentPerson = new OxfordPerson() { personId = id, name = viewModel.UserName, userData = JsonConvert.SerializeObject(userData).EncodeBase64() }; } var stream = await capturePhotoStreamAsync(); if (stream != null) { var image = new BitmapImage(); await image.SetSourceAsync(stream); photo.Source = image; var faceId = await FaceApiService.AddPersonFaceAsync(personGroupId, currentPerson.personId, stream); Debug.WriteLine($"Face added to person {currentPerson.personId} with ID: {faceId}"); stream.Dispose(); } else { viewModel.OxfordStatus = "Unable to capture the photo."; } }