Warnings are too easy to ignore.
Consider treating all warnings as errors by setting the TreatWarningsAsErrors property to true in your project files(s) or your directory level Directory.Build.props file(s).
I always turn this on for all greenfield projects.
For existing brownfield projects it can be a little painful sometimes to turn it on as depending on the code base there could be a lot of compile errors flagged.
It’s worth it to fix these issues in the long run but as a step in the right direction remember you can set this on a project by project basis and you can exclude certain exceptions via the WarningsNotAsErrors property shown above if you need to.
Do you treat any warnings as errors?