using System;

using System.Collections.Generic;

using AutoMapper;

public class Program

    {

       public static void Main(string[] args)

        {

            Mapper.Initialize(cfg =>

            {

                cfg.AllowNullCollections = true;

                cfg.CreateMap<GeneralInfo, GeneralInfo>()

                .ForAllMembers(opts => opts.Condition((src, dest, srcMember) =>

                    srcMember != null

                ));

​

            });

            GeneralInfo gi = new GeneralInfo();

            gi.Descr = "Test";

            gi.Dt = DateTime.Now;

            gi.Qty = 1;

            gi.PersonList = new List<Person>();

            gi.PersonList.Add(new Person { Num = 1, Name = "John", Surname = "Scott" });

​

            GeneralInfo gi2 = new GeneralInfo();

            gi2.Qty = 3;

            Console.WriteLine("Count antes de mapeo = " + gi.PersonList.Count);

            Mapper.Map<GeneralInfo, GeneralInfo>(gi2, gi);

            Console.WriteLine("Count despues de mapeo = " + gi.PersonList.Count);

            // Error : gi.PersonList.Count == 0 !!!! 

            //por que? si arriba esta: Condition((src, dest, srcMember) => srcMember != null ...

        }

    }

​

    class Person

    {

        public int Num { get; set; }

        public string Name { get; set; }

        public string Surname { get; set; }

    }

​

    class GeneralInfo

    {

        public int? Qty { get; set; }

        public DateTime? Dt { get; set; }

        public string Descr { get; set; }

        public List<Person> PersonList { get; set; }

    }