ListBox选中事件中获取选中项

<ListBox x:Name="MenuList" FontSize="12" SelectionChanged="MenuList_SelectionChanged" ScrollViewer.HorizontalScrollBarVisibility="Auto" ScrollViewer.VerticalScrollBarVisibility="Auto">

 

 </ListBox>

<ListBox x:Name="MenuList" FontSize="12" SelectionChanged="MenuList_SelectionChanged" ScrollViewer.HorizontalScrollBarVisibility="Auto" ScrollViewer.VerticalScrollBarVisibility="Auto">

  </ListBox>

后台：

　　　private void MenuList_SelectionChanged(object sender, SelectionChangedEventArgs e)

        {

            var menuListBox = sender as System.Windows.Controls.ListBox;

            //((StudySL.MenuInfo)menuListBox.SelectedItem).ID;

　　　　}