title: CaliburnMicro Binding View inside RadGridView.RowDetailsTemplate
body: <p>I have a RadGridView with a GridViewToggleRowDetailsColumn, which can expand a selected item and show more Details. I want to use CaliburnMicro to Display the DetailsView, so I add a property of the DetailsViewModel to my "MainViewModel" and add a ContentControl with a Binding to it. </p>
  
  <pre><code> &lt;telerik:RadGridView ItemsSource="{Binding Products.View}"
               SelectedItem="{Binding SelectedProduct}"  ... &gt; 
  
              &lt;telerik:RadGridView.RowDetailsTemplate&gt;
                  &lt;DataTemplate&gt;
                      &lt;ContentControl cal:View.Model="{Binding ProductDetailsViewModel}" /&gt;
                  &lt;/DataTemplate&gt;
              &lt;/telerik:RadGridView.RowDetailsTemplate&gt;
  
  
              &lt;telerik:RadGridView.Columns&gt;
                  &lt;telerik:GridViewToggleRowDetailsColumn /&gt;
  
                  ...Columndefinitions...
  
              &lt;telerik:RadGridView.Columns&gt;                   
          &lt;/telerik:RadGridView&gt;
  </code></pre>
  
  <p>The problem is, that the Details are not displayed. From <a href="https://stackoverflow.com/questions/23035648/binding-view-and-viewmodel-on-a-datagrid">here</a> I read that the binding fails because of the ItemsSource. So i tried</p>
  
  <pre><code>&lt;ContentControl cal:View.Model="{Binding ProductDetailsViewModel, RelativeSource={RelativeSource FindAncestor, AncestorType=UserControl}}" /&gt;
  </code></pre>
  
  <p>but it still does not work. </p>