I’m the author and owner of a similar code style/code quality package in a fairly large company and went through a very similar process, culminating with writing our own Roslyn-based analyzers to enforce various internal practices to supplant the customized configuration of the Microsoft provided analyzers. Also, we discovered that different projects need different level of analysis. We’re less strict with e.g test projects than core infrastructure. But all projects need to have the same formatting and style. That too can be easily done with one nuget using msbuild.