Definitely. It was created by Jeff Atwood who is a very "pro-Microsoft" figurehead in the .NET community so there was probably a lot of collaboration in this move.
As catkin has pointed out, Jeff left SE a good while ago. Also his current baby, Discourse [0], is built on Ruby on Rails, Postgres, Redis at the back end and ember.js on the front [1].
[0]: http://www.discourse.org/
[1]: http://www.discourse.org/faq/#tech