title: Align TextBlock inside a ListBoxItem
body: <p>I'm developing a <strong>Windows Phone 7</strong> application.</p>
  
  <p>I want to center vertically a textblock inside a ListBoxItem. Here is my XAML code:</p>
  
  <pre><code>&lt;ListBoxItem x:Name="SingleGameItem" Height="79" Margin="10,5"&gt;
      &lt;TextBlock HorizontalAlignment="Center" Height="31" Margin="5" TextWrapping="Wrap" Text="TextBlock" VerticalAlignment="Center" Width="431" TextAlignment="Center"/&gt;
  &lt;/ListBoxItem&gt;
  </code></pre>
  
  <p>How can I do that?</p>