Commercial license is not required for the plain C# extension, which is distributed under a custom license for extension install[0] and under MIT for source code[1].
The features of DevKit (which is uninstalled on my system) are as follows[2]:
- VS-style solution explorer
- VS-style test explorer
- Intellicode (extra extension that integrates with DevKit)
I don't have use for any of these, preferring folder style navigation and CMD+T/P/etc., and GitHub Copilot autocomplete does way better job for any text than Intellicode. The "intellisense" VS calls it is just a base autocomplete feature in VSC that works for any language provided it has a back-end that integrates through LSP.
[0] https://github.com/dotnet/vscode-csharp/blob/main/RuntimeLic...
[1] https://github.com/dotnet/vscode-csharp/blob/main/LICENSE.tx...
[2] https://marketplace.visualstudio.com/items?itemName=ms-dotne...