I appreciate the motivation behind the merge. I can understand why people would crosspost between the two. As a Java developer I have a passing fancy with C# but zero interest in the overall platform. Having a unified community likely increases my noise to signal ratio, and I'd probably just unsub if I became noticeable.
That said, I'm not the core audience for any of it. I'm not going to vote because the poll should be about the core users, but figured I'd offer a perspective.
SOFT REDIRECT: Submissions still allowed, but a message is shown on the sidebar, asking users to post to /c/dotnet, unless their content is not suited there.
No hard redirect dot net has more languages than c# so IMHO there is a need for a separate community dedicated o c#, at least until the blackout of /r/csharp ends, a few weeks aftre that point it might be a good idea to see if the communeties over here stil are active enugh to vorrent them being separate.