C# References not being highlighted or used in hovers or warnings in Cursor

Imported settings from VSCode, where everything works lovely. In Cursor, lots of things in the text are not highlighted for what they are, and there is no hover over these items, and if they are in any way in error no error or warning is visible. These are (from what I can see) stuff from referenced files (in the usings). I’ve wasted some hours frigging around with Settings to try and fix this but no luck. This is a show-stopper for me, so ideally this will be something I can fix. I’d love some support on this.
Saltminer