in WPF, the list items contains some of items, when an item in `list items` is selected, i need to handle some of event on the selected item

after create a method that get the selected item

```
 private void Button_Click_1(object sender, RoutedEventArgs e)
    {
        string y = this.LBOX.SelectedItem.ToString();
        MessageBox.Show(y);
    }

```

this method show : `System.Windows.Control.ListBoxItem.List1`