private async void LoadingImage2_Click(object sender, RoutedEventArgs e)
        {
            // Load Image
            LoadingImage2 = true;
            var openFileDialog = ImageDialogHelper.GetFileDialog();

            if (openFileDialog.ShowDialog() == true)
            {
                ImageDialogHelper.LoadImage(img2, openFileDialog.FileName);
                await DetectLocalAsync(txtImage2, openFileDialog.FileName);
            }
            LoadingImage2 = false;
        }
        private async void AddFaceToPerson_Click(object sender, RoutedEventArgs e)
        {
            var gid = StringHelper.GetIdFromText(PersonGroupListBox.SelectedItem.ToString()).FirstOrDefault();
            var id  = StringHelper.GetIdFromText(PersonListBox.SelectedItem.ToString()).FirstOrDefault();

            // Load Image
            var openFileDialog = ImageDialogHelper.GetFileDialog();

            if (openFileDialog.ShowDialog() == true)
            {
                using (Stream imageStream = File.OpenRead(openFileDialog.FileName))
                {
                    await FaceClient.PersonGroupPerson.AddFaceFromStreamAsync(gid, Guid.Parse(id), imageStream);
                }
            }

            // Train!
            await FaceClient.PersonGroup.TrainAsync(gid);

            InitPersonDetailsListBox(id, gid);
        }