New Post: [Version 2.0] Prism Region Adapter

<local:PanesTemplateSelector.DocumentTemplate>
                        <DataTemplate>
                            <ContentControl 
                                x:Name="DocumentRegion" 
                                prism:RegionManager.RegionName="{Binding RegionName}"/>
                        </DataTemplate>
</local:PanesTemplateSelector.DocumentTemplate>

and got my content from dynamically loaded modules hosted in the document window indeed, 
but it disapperead as soon as a document window was dragged to floating state or another tab selected.
Something to do with the DelayedRegionCreationBehavior not finding the region I suppose, but reading up
on all that would have taken me a lot of time. Giving the content control within the template not a region
but another content control with a region did the trick.

Thank you for the hint.

Frank