C# extension is MIT, even though vsdbg it ships with is closed-source. There's a fork that replaces it with netcoredbg which is open.
C# DevKit is however based on VS license. It builds on top of base C# extension, the core features like debugger, language server, auto-complete and auto-fixers integration, etc. are in the base extension.
C# DevKit is however based on VS license. It builds on top of base C# extension, the core features like debugger, language server, auto-complete and auto-fixers integration, etc. are in the base extension.