using System;

using AutoMapper;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

        var config = new MapperConfiguration(cfg => {

                cfg.CreateMap<Person, Person>();

                cfg.CreateMap<Brain, Brain>()

                    .ForMember(dest => dest.Person, opt => opt.Ignore());

            });

        IMapper iMapper = config.CreateMapper();

        var source = new Person();

        source.Brain = new Brain();

        source.FirstName = "test";

        source.Brain.Name = "testBrain";

        source.Brain.Person = source;

        var destination = iMapper.Map<Person, Person>(source);

        source.Brain.Name = "originalBrain";

        Console.WriteLine(destination.Brain.Name);

        Console.WriteLine(destination.Brain.Person == null);

    }

}

​

public class Person {

    public string FirstName { get; set; }

    public string LastName { get; set; }

    public Brain Brain {get;set;}

}

​

public class Brain {

    public Person Person {get;set;}

    public string Name { get; set; }

}