public void AddItem(SelectedMemberNodeItem authorItem)
 {
     if (!CurrentSelectBtn.IsChecked.GetValueOrDefault()) return;
     _authorList.Add(authorItem);
     SelectedListBox.SelectedItem = authorItem;
 }
 public AuthorEventArgs(SelectedMemberNodeItem enitiy)
 {
     AuthorEnitiy = enitiy;
 }