Stack Overflow (and its offshoots) was (is?) very MS-centric, but it's clearly in the minority.
Why would stack overflow focus on MS when MS has their own forums and developer resources? I have to admit, I don't look for MS things on stack, but everything else I have questions about I'll look there. In fact, most searches for MS related questions are found on sites other than stack.
IOW, WTF ???
No problem, it's wrong that your comment was downvoted. Even with my upvote it's still grey.
I think there might also be a codinghorror blog post that details why they picked .net, but I'm having a hard time finding it.