private void btnAddPhoto_Click(object sender, RoutedEventArgs e)
        {
            SaveFileDialog saveDlg = new SaveFileDialog {
                Filter = "Image files |*.jpg"
            };

            if (true == saveDlg.ShowDialog())
            {
                BitmapImage photo = new BitmapImage(new Uri(saveDlg.FileName));
                UserImage.Source       = photo;
                userImageCircle.Source = photo;
                viewModel.AddPhoto(photo);
            }
        }