Using Virtual Earth in a WPF Application

Marc Schweigert shows you how to draw a polygon on a Virtual Earth map and save it using ASP.NET AJAX, Windows Communication Foundation (WCF), LINQ to SQL, and the new geography data type in SQL Server 2008.
To download the source code visit:
https://blogs.msdn.com/devkeydet/archive/2008/07/18/screencast-saving-virtual-earth-polygons-to-sql-server-2008.aspx
There are other feeds, like one for your blog, one for all screencasts, one for all media, etc… that would contain this post."
However, I notice that when you navigate to
https://channel9.msdn.com/Media/Screencasts/ and click the "Subscribe" icon, you get redirected to the main site feed (https://channel9.msdn.com/Feeds/RSS/). I'm following up and will report back with how
one is supposed to discover the "all screencasts" feed.
-Marc