using AutoMapper;

using System;

using System.Collections.Generic;

public class Program

{

    public static void Main(string[] args)

    {

        Mapper.Initialize(cfg => cfg.CreateMap<A, B>().ReverseMap());

​

        var objA = new A

        {

            Prop = new List<AClass>

            {

                new AClass { Name = "Magneto" },

                new AClass { Name = "Wolverine" }

            }

        };

​

        var objB = Mapper.Map<B>(objA);

        Console.WriteLine(objB.Prop[0].Name);

        Console.WriteLine(objB.Prop[1].Name);

    }

}

​

public class A

{

    public List<AClass> Prop { get; set; }

}

​

public class AClass

{

    public string Name { get; set; }

}

​

public class B

{

    public List<BClass> Prop { get; set; }

}

​

public class BClass

{

    public string Name { get; set; }

}