title: Problem with the RegionManager with custom RegionAdapter for DevExpress
body: <p>I wrote a custom region adapter for a DevExpress ribbon. </p>
  
  <pre><code>public class dxDocumentGroupRegionAdapter : RegionAdapterBase&lt;DocumentGroup&gt;
  {
      private DocumentGroup _instance;
  
      public dxDocumentGroupRegionAdapter(IRegionBehaviorFactory regionBehaviorFactory)
          : base(regionBehaviorFactory)
      { }
  
      protected override IRegion CreateRegion()
      {
          return new AllActiveRegion();
      }
  
      protected override void Adapt(IRegion region, DocumentGroup regionTarget)
      {
          _instance = regionTarget;
          regionTarget.Items.Clear();
  
          region.ActiveViews.CollectionChanged += new System.Collections.Specialized.NotifyCollectionChangedEventHandler((x, y)
          =&gt;
          {
              switch (y.Action)
              { 
                  case NotifyCollectionChangedAction.Add:
                      foreach (object __panel in y.NewItems)
                      {
                          if (__panel is DocumentPanel)
                              _instance.Items.Add(__panel as DocumentPanel);
                          else
                          {
                              if (__panel is UIElement)
                              {
                                  DocumentPanel panel = new DocumentPanel();
                                  panel.Content = __panel;
  
                                  _instance.Items.Add(panel);
  
                              }
                          }
                      }
                      break;
  
                  case NotifyCollectionChangedAction.Remove:
                      foreach (DocumentPanel __panel in y.NewItems)
                      {
                          _instance.Items.Remove(__panel);
  
                      }
                      break;
              }
          });
  
          region.ActiveViews.ToList().ForEach( x =&gt; regionTarget.Items.Add(x as DocumentPanel));
      }
  </code></pre>
  
  <p>In the xaml of my shell I registerd a region</p>
  
  <pre><code>&lt;dxd:DocumentGroup cal:RegionManager.RegionName="RibbonTabRegion" [...]
  </code></pre>
  
  <p>In the code behind I´m importing an instance of RegionManager.On demand the bootstrapper is calling my region adapter, but there is no entry of the region in my RegionManager. 
  I also tried </p>
  
  <pre><code>RegionManager.SetRegionManager(this, rManager)
  </code></pre>
  
  <p>But without success. 
  Curiously enough</p>
  
  <pre><code>rManager.RegisterViewWithRegion("regionName", typeof(view))
  </code></pre>
  
  <p>works for me, but rManager.RequestNavigate does not. </p>
  
  <p>Any idea?</p>
  
  <p><strong>EDIT</strong></p>
  
  <p>I found a way to solve this problem.
  I have to register my region manually: </p>
  
  <pre><code> IRegionAdapter regionAdapter = new Prism.dxDocumentGroupRegionAdapter(this.Container.GetExportedValue&lt;IRegionBehaviorFactory&gt;());
   IRegion region = regionAdapter.Initialize(this.documentContainer, Types.ConstantValues.MainRibbonTabRegionName);
   this.tRegionManager.Regions.Add(region);
  </code></pre>