private void ButtonOK_OnClick(object sender, RoutedEventArgs e)
        {
            if (this.ListBox.SelectedItem == null)
            {
                return;
            }
            ActorSelectData actor = ListBox.SelectedItem as ActorSelectData;

            if (actor == null)
            {
                return;
            }
            this.DialogResult = true;
        }
        public ActorSelectData GetActorSelectData()
        {
            ActorSelectData actor = ListBox.SelectedItem as ActorSelectData;

            return(actor);
        }