How to register multiple implementations of the same interface in Asp.Net Core?

Question

I have services that are derived from the same interface.

public interface IService { }
public class ServiceA : IService { }
public class ServiceB : IService         


        

Answer 1

Most of the answers here violate the single responsibility principle (a service class should not resolve dependencies itself) and/or use the service locator anti-pattern.

Another option to avoid these problems is to:

• use an additional generic type parameter on the interface or a new interface implementing the non generic interface,
• implement an adapter/interceptor class to add the marker type and then
• use the generic type as “name”

I’ve written an article with more details: Dependency Injection in .NET: A way to work around missing named registrations