Many of us have .NET experience, really like C# but have sensible reasons for not recommending it. A Microsoft only stack is nowhere near as flexible as Linux and if you were to reach Stack Overflow's levels of traffic you'll not be able to avoid the need to run a part of your infrastructure on Linux. I seriously doubt Stack Overflow is running Redis, ElasticSearch & HAProxy* on Windows. Unless you already have a team proficient in .NET, there are few good reasons to use it instead of a JVM language.
*https://github.com/opserver/Opserver/tree/master/Opserver.Co...