[benbristow]

Indeed. To use the new C# devkit in Visual Studio Code you need a Visual Studio/MSDN subscription too.

JetBrains Rider's a bigger competitor but even then (at least at my org.) most devs have a Visual Studio Professional/Enterprise subscription as a backup.

[notpushkin]

There are alternatives though. I've heard somebody hooked up Samsung's open source C# debugger, for example.