How to bypass Microsoft.Bcl.Build warning

Question

I have a solution with multiple projects, one of them has this build warning that shows

All projects referencing Project.csproj must install nuget

Answer 1

I have resolved the issue by completely removing all Microsoft.Bcl and Microsoft.Bcl.Build references as @nozzleman suggested in comments.

Although no dll references were present in the References list in solution explorer, there were entries in package.config for those 2 packages as below:

I did a search (Ctrl + F) in full solution for the terms Microsoft.Bcl and Microsoft.Bcl.Build and removed all those entries from packages.config and also from .csproj files which had entries like below:

Those lines were appended when it was installed before and as someone manually removed references by pressing Delete key, they were not removed.

After cleaning those 2 items from everywhere the warning is gone from build.