How do I inject all implementations for a given service?

Question

How do I inject a list of all of the registered implementations for a given service interface?

  public class Thing
  {
      public Thing(IList<IService> services) { }
  }

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

Given registrations like this:

  public class Startup 
  {  
      public void ConfigureServices(IServiceCollection services)
      {
          services
              .AddTransient<IService, ServiceA>()
              .AddTransient<IService, ServiceB>()
              .AddTransient<IService, ServiceC>();
      }
  }

Answer 1

As of ASP.NET Core 2.0, if you inject your dependencies as IEnumerable<IService> instead of IList<IService>, you can forgo registering the list itself, leaving you with just the individual services registration.