ExpressMapper.Core is a fork of Expressmapper built against netstandard2.0 and net471. The only code changes at this point (6/2019) are project / solution level changes from the original project, which itself has been quiet since 2017, and was in desparate need of an update. The "NETCORE" project version was an old xproj thing, etc.
Expressmapper – .Net open source library - lightweight, lighting fast .Net mapper to map one type of object(s) to another in automated and easy way. ExpressMapper relies completely on the expression trees. It is a great and faster alternative to Automapper and other .Net mappers.
Full documentation you can find at http://www.expressmapper.org
Expressmapper news, discussions and votes on FB.
New documentation update for version Expressmapper 1.8 see What's new?.