Migrate StyleCop to StyleCopAnalyzers #2
Description
The project originally used StyleCop to enforce code style. This has been deprecated, and replaced with StyleCopAnalyzers. We should find what rules were used with StyleCop, and apply the same rules with StyleCopAnalyzers.
We should prefer the NuGet package of StyleCopAnalyzers, so developers don't have to install extensions for this to work, and so it works when running msbuild from the command line.