[neonsunset]

There are no special license terms to using Roslyn Language Server, which is what the base C# extension in VSC uses. It is the debugger which is closed-source, and the custom license terms apply mostly to that debugger and to Dev Kit extension which has a subscription. Both are completely optional and there is also an extension fork which uses NetCoreDbg developed by Samsung and licensed under MIT. It is what people usually use when they debug C# in e.g. Neovim.