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Handles ListBoxItem Selected events for the ListBoxItems in the inner ListBox

<Window x: Class="WpfApplication1.Window1"     xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"     Title="WPF" Height="300" Width="300">     <StackPanel>         <ListBox SelectionChanged="OuterListBox_SelectionChanged" Name="outerListBox">             <ListBoxItem Content="Item 1" FontFamily="Tahoma" HorizontalContentAlignment="Left" />             <ListBoxItem Content="Item 2" FontFamily="Algerian" FontSize="16" HorizontalContentAlignment="Center" />             <ListBoxItem Content="Item 3" FontSize="20" HorizontalContentAlignment="Right" />             <Button Content="Button directly in a list" Margin="5" />             <ListBoxItem HorizontalContentAlignment="Center" Margin="5">                 <Button Content="Button wrapped in ListBoxItem" />             </ListBoxItem>             <ListBox Height="50" Margin="5">                 <ListBoxItem Content="Inner List Item 1" Selected="InnerListBoxItem_Selected" />                 <ListBoxItem Content="Inner List Item 2" Selected="InnerListBoxItem_Selected" />                 <ListBoxItem Content="Inner List Item 3" Selected="InnerListBoxItem_Selected" />                 <ListBoxItem Content="Inner List Item 4" Selected="InnerListBoxItem_Selected" />             </ListBox>             <StackPanel Margin="5" Orientation="Horizontal">                 <Label Content="Enter some text:" />                 <TextBox MinWidth="150" />             </StackPanel>         </ListBox>         <TextBlock Text="No item currently selected." Margin="10" HorizontalAlignment="Center" Name="txtSelectedItem" />     </StackPanel> </Window> //File:Window.xaml.vb Imports System.Windows Imports System.Windows.Controls Namespace WpfApplication1   Public Partial Class Window1     Inherits Window     Public Sub New()       InitializeComponent()     End Sub     Private Sub InnerListBoxItem_Selected(sender As Object, e As RoutedEventArgs)       Dim item As ListBoxItem = TryCast(e.OriginalSource, ListBoxItem)       If item IsNot Nothing Then         MessageBox.Show(Convert.ToString(item.Content) & " was selected.", Title)       End If     End Sub     Private Sub OuterListBox_SelectionChanged(sender As Object, e As SelectionChangedEventArgs)       Dim item As Object = outerListBox.SelectedItem       If item Is Nothing Then         txtSelectedItem.Text = "No item currently selected."       Else         txtSelectedItem.Text = item.ToString()       End If     End Sub   End Class End Namespace