public void UploadPicture(MemoryStream chosenPhoto) { if (_customer == null) return; IsLoading = true; var data = chosenPhoto.ToArray(); var service = new CustomerService(new ApiConfiguration(), null, _keyService); service.SavePhotoAsync(_companyFile, _customer.UID, data, Credentials) .ContinueWith(t => { IsLoading = false; }, TaskScheduler.FromCurrentSynchronizationContext()); }