ASP. NET Core 2.1 pull the controller away from the class library

Startup.cs added in the configureservices:

         Public void configureservices (iservicecollection services)        {            var mall = Assembly.Load (new AssemblyName ("mall.mvc" ) )); The assembly name of the class library            services. Addmvc (). Addapplicationpart (Mall);         }

After configuration, ensure that the site references the class library, you can directly add the controller in the class library, the site can also be accessed.

ASP. NET Core 2.1 pull the controller away from the class library