title: RibbonGallery disabled in .net 4.6
body: <p>I'm creating an application using RibbonController in WPF.</p>
  
  <p>It's working fine until i installed .net 4.6. Then my "RibbonGallery" is disabled state (Viewpoints Drop Down menu) . I tried to enable through Code also but no luck ;(.</p>
  
  <pre><code>&lt;Custom:RibbonGallery SelectedValue="Entrancelobby" SelectedValuePath="Content" ScrollViewer.VerticalScrollBarVisibility="Visible" MaxHeight="500"&gt;
          &lt;Custom:RibbonGalleryCategory Name="viewpointsList" FontFamily="Times New Roman" FontSize="14"&gt;  
                &lt;Custom:RibbonGalleryItem Content="Entrancelobby" Foreground="Black" /&gt;
                &lt;Custom:RibbonGalleryItem Content="Entrancelobby 01" Foreground="Black"/&gt; 
          &lt;Custom:RibbonGalleryCategory&gt;
  &lt;/Custom:RibbonGallery&gt;
  </code></pre>
  
  <p>See attachments
  <strong>No issue with 4.5</strong>   <a href="https://i.stack.imgur.com/nbfRf.png" rel="noreferrer"><img src="https://i.stack.imgur.com/nbfRf.png" alt=".Net 4.5 (Working)"></a> </p>
  
  <p><strong>.Net 4.6 (issue)</strong> <a href="https://i.stack.imgur.com/eB4ZW.png" rel="noreferrer"><img src="https://i.stack.imgur.com/eB4ZW.png" alt="enter image description here"></a></p>
  
  <p>Thanks in advance...</p>