Best tools/frameworks/approaches to test structure of the .Net Framework solution

I'm looking for a tool/framework to test the structure of the .Net Framework Solution(not structure of the unit test projects).

Example of the tests:

Since I switched my solution from package.config to PackageReference, I'd like to have a test to be sure there isn't any package.config file in any project of my solution(so I will be sure no one will add new project with package.config in our solution).

Does anybody know best practices/tools/frameworks for tests like that?