In VS 2012, we introduced the notion of “round-tripping”. This meant the ability for VS 2012 to load and save VS 2010 compatible solutions/projects. That was a huge customer ask and I’ve heard a lot of feedback since then that customers rely on it.
At TechEd this week, I was asked what the story with 2013 would be. Specifically, with the move to a more rapid cadence, I heard that this feature is more important than ever. In fact, some of the customers I spoke with wanted to make sure that not only could VS 2013 support round tripping with VS 2012 but it could also support round tripping with VS 2010.
I didn’t know off the top of my head about 2010 but I promised to check. The short answer is yes, we will support both. There will likely be some exceptions of project types that require 1-way migration or some such but the majority of project types will round trip seamlessly. We’ll publish more official guidance on this as we get closer to release and, of course, you can try it out for yourself when you get the preview later this month.