title: Place a dividing line in a menu in WPF
body: <p>In XAML, how do I put a standard dividing line in a menu?</p>
  
  <p>eg</p>
  
  <pre><code>&lt;MenuItem Header="_File" Name="m_fileMenu"&gt;
      &lt;MenuItem Header="_Open" Command="ApplicationCommands.Open"/&gt;
      &lt;!-- Trying to put a divider here! --&gt;
      &lt;MenuItem Header="-" /&gt;  &lt;!-- Wrong guess --&gt;
      &lt;MenuItem Header="E_xit" Command="ApplicationCommands.Close" /&gt;
  &lt;/MenuItem&gt;
  </code></pre>