private void MemberPickerEditor_OnPrimaryButtonClick(MemberPickerEditor editor)
 {
     SelectedAvatars.Clear();
     foreach (var item in editor.SelectedAvatars)
     {
         SelectedAvatars.Add(item);
     }
     EditorFlyout.Hide();
 }
 private void MemberPickerEditor_OnCloseButtonClick(MemberPickerEditor editor)
 {
     EditorFlyout.Hide();
 }