I'm pretty sure the real reason Microsoft released VSCode is because they had already written a lot of the code for their online text editor widget and needed a Linux/Mac editor to increase C# and especially typescript popularity
The C# support in VSCode is kinda piss poor unless it's changed significantly in recent months. Last time I used it to try to work on a small project I ended up abandoning it and using Visual Studio proper. I wanted it to work out, but it just didn't work good.
C# support in VSCode is fine at the moment; I sometimes use it for quick scratch-code experiments. The OmniSharp-powered extension which provides basic support is under constant development, so things may have improved since you last used it. Microsoft have also added a closed-source extension recently which provides Visual Studio-like extra features on top, like Solution Explorer, better Test integration etc.; that's free for individuals and small teams but you need a Visual Studio Subscription if you want to use it in large teams or if you're making >$1M per annum:
