title: Vertical separator in WPF Ribbon
body: <p>How can I add Vertical separator to WPF Ribbon, to RibbonGroup? I have tried something like that, but i got horizontal separator istead of vertical.</p>
  
  <pre><code>&lt;r:RibbonGroup&gt;
  &lt;r:RibbonButton Command="{StaticResource SomeButton}" /&gt;     
   &lt;r:RibbonSeparator&gt;&lt;/r:RibbonSeparator&gt; 
   &lt;r:RibbonToggleButton IsChecked="False" Command="{StaticResource AnotherButton}"/&gt;&lt;/r:RibbonToggleButton&gt;
   &lt;/r:RibbonGroup&gt;
  </code></pre>
  
  <p>So how can I make vertical separator?</p>