Are you for another challenge.
I just upgraded the code in accordance to Building IG Outlook Part 6 - Adding Ribbon Tabs to View Navigation video , https://www.youtube.com/watch?v=xH6OgCxdXQc,
The video is 27 minutes long
The new feature added is to display add a ribbon tab to the ribbon when navigating to a view and removing existing ribbon tabs.
This is accomplished via an attribute, a region behavior, and a region tab item.
It seems like new code was pretty much related to just PRISM and WPF.
Well It the upgraded code did not work as is shown at the end of the video.
I can add the the 3 solution links out on GITHUB if you want to take a stab a getting the upgraded code to work.
One solution would be the code related to the video
A second solution would be the upgraded code that follows the video that does not work .
The Third solution would be the working code for the prior video - Building IG Outlook Part 5 - Implementing Navigation and a little MVVM, https://www.youtube.com/watch?v=cSwubHHxEtk
If you want to take a stab at getting the upgraded code to work let me know and I will post the three solutions for download.