title: Menu item in Navigation region (WPF Prism)
body: <p>I have a modular WPF Prism application as described in this question: <a href="https://stackoverflow.com/questions/40485593/sub-modules-within-a-region-in-wpf-prism?noredirect=1#comment68223935_40485593">Sub-modules within a Region in WPF Prism</a></p>
  
  <p>Every main module (A, B and C) registers a NavigationItemView in the NavigationRegion and an ItemView in the MainRegion. So whenever a NavitaionItemView is pressed, the corresponding ItemView is loaded in the MainRegion.</p>
  
  <p>But now, I want to add a button in the NavigationRegion that is not a NavigationItemView so it has no associate ItemView loaded in the MainRegion; but instead, it is a Menu (with an image and some menu items). Something like this:</p>
  
  <pre><code>&lt;Menu&gt;
      &lt;MenuItem ToolTip="Settings" Background="#D6D6DC" BorderBrush="#D6D6DC"&gt;
          &lt;MenuItem.Header&gt;
              &lt;StackPanel&gt;
                  &lt;Image Source="Images/settings2.png" Width="30" Height="30" /&gt;
              &lt;/StackPanel&gt;
          &lt;/MenuItem.Header&gt;
          &lt;MenuItem Header="_Language"&gt;
              &lt;MenuItem x:Name="MenuItem_English" IsCheckable="True" Header="English" Click="MenuItem_Click" /&gt;
              &lt;MenuItem x:Name="MenuItem_Spanish" IsCheckable="True" Header="Spanish" Click="MenuItem_Click"/&gt;
          &lt;/MenuItem&gt;
          &lt;Separator/&gt;
          &lt;MenuItem Header="Load file" x:Name="MenuItem_LoadFile" Click="LoadFile" /&gt;
  
      &lt;/MenuItem&gt;
  &lt;/Menu&gt;
  </code></pre>
  
  <p>What is the best approach to do this within Prism framework? I am quite new to Prism, so the further details on how to organize the classes the better. Thanks in advance!</p>
  
  <p><strong>Clarification:</strong></p>
  
  <p>My Shell has two regions (NavigationRegion -which is a ToolBar- and MainContentRegion - which is a ContentControl-). Every module registers a ModuleNavigationView in the NavigationRegion and a ModuleView in the MainContentRegion. Whenever the ModuleNavigationView is pressed, the ModuleView is shown in the MainContentRegion.</p>
  
  <p>I want to add another item (Menu) to the toolbar (just like the ModuleNavigationView's), but this one is a special one because it doesn't show anything in the MainContentRegion, but instead shows a menu with some options.</p>
  
  <p>And my question is if this settings menu should be another Module. What's the best approach to accomplish this?</p>