using System;

using Autofac;

using System.Collections.Generic;

using System.Linq;

public class Program

{

    public static void Main()

    {

        var builder = new ContainerBuilder();

        builder.RegisterAssemblyTypes(typeof(Program).Assembly)

            .AsImplementedInterfaces();

        builder.RegisterType<Mercedes>().SingleInstance();

        var container = builder.Build();

        var cars = container.Resolve<IEnumerable<ICar>>();

        Console.WriteLine(cars.Contains(container.Resolve<Mercedes>()));

    }

}

​

public interface ICar { }

public class Mercedes : ICar { } 

public class Ferrari : ICar { }