Starting at version 6.0, AceQL C# Client SDK is now a .Net Standard 2.0 library.
Please go to the new AceQL C# SDK Project: https://github.com/kawansoft/AceQL.Client2.
(If you need to access the AceQL C# Client SDK v5.5 documentation and code, go to this branch: https://github.com/kawansoft/AceQL.Client/tree/5.5. The v5.5 package is still accessible on NuGet.)