Noticed this with System.DirectoryServices.Protocols:
system.directoryservices.protocols\4.7.0\lib\netstandard2.0\System.DirectoryServices.Protocols.xml
system.directoryservices.protocols\4.7.0\ref\netstandard2.0\System.DirectoryServices.Protocols.xml
system.directoryservices.protocols\4.7.0\runtimes\win\lib\netcoreapp2.0\System.DirectoryServices.Protocols.xml
Both the lib and runtimes xml's will never be used.