title: Showing submenu to right in vertical menu bar
body: <p>I have following code, which shows vertical menu.</p>
  
  <p>How can I place submenu to be populated on right?</p>
  
  <pre><code>&lt;Menu Background="Transparent" Foreground="Honeydew"&gt;
      &lt;Menu.ItemsPanel&gt;
          &lt;ItemsPanelTemplate&gt;
              &lt;VirtualizingStackPanel Orientation="Vertical"/&gt;
          &lt;/ItemsPanelTemplate&gt;
      &lt;/Menu.ItemsPanel&gt;
      &lt;MenuItem Header="File"&gt;
          &lt;MenuItem Header="File1"&gt;&lt;/MenuItem&gt;
          &lt;MenuItem Header="File1"&gt;&lt;/MenuItem&gt;
          &lt;MenuItem Header="File1"&gt;&lt;/MenuItem&gt;
          &lt;MenuItem Header="File1"&gt;&lt;/MenuItem&gt;
      &lt;/MenuItem&gt;
      &lt;MenuItem Header="Edit"&gt;
          &lt;MenuItem Header="File1"&gt;&lt;/MenuItem&gt;
          &lt;MenuItem Header="File1"&gt;&lt;/MenuItem&gt;
          &lt;MenuItem Header="File1"&gt;&lt;/MenuItem&gt;
          &lt;MenuItem Header="File1"&gt;&lt;/MenuItem&gt;
      &lt;/MenuItem&gt;
  &lt;/Menu&gt;
  </code></pre>