How do I get OmniSharp to work?

[meclondrej]

I tried omnisharp-roslyn from the AUR and
omnisharp-linux-x64-net6.0.zip from the OmniSharp/omnisharp-roslyn repo releases. Both can show syntax errors, but that's the end of it, nothing else. No autocompletion, no underlining undefined names, nothing.

[meclondrej]

I didn't add my csproj to my solution file. When I added it with dotnet sln add project.csproj, OmniSharp started to work. Not seeing autoimports in the autocompletion though, I have to select the unimported class and open up code actions with a.