The preferable way to use this package is to add the NuGet package DotNetAnalyzers.PublicApiAnalyzer to the project where you want to enforce rules.
The severity of individual rules may be configured using rule set files in Visual Studio 2015.
If you use older versions of Visual Studio in addition to Visual Studio 2015, you may still install these analyzers. They will be automatically disabled when you open the project back up in Visual Studio 2013 or earlier.
See Contributing