#nullable enable

using System;

using AutoMapper;

public class Program

{

    public static void Main()

    {

        var config = new MapperConfiguration(cfg =>

        {

            cfg.CreateMap<int?, int>().ConvertUsing((src, dest) => src ?? dest);

​

            cfg.CreateMap<SrcExample, DestExample>()

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

        });

        var mapper = new Mapper(config);

        SrcExample src = new SrcExample

        {

            Name = null,

            Age = null,

        };

        DestExample dest = new DestExample();

        mapper.Map(src, dest);

        Console.WriteLine(dest.Name);

        Console.WriteLine(dest.Age);

    }

}

​

class SrcExample

{

    public string? Name { get; set; }

    public int? Age { get; set; }

}

​

class DestExample

{

    private string name;

    public string Name  

    {

        get { return name; }  

        set {

            Console.WriteLine("Call set name");

            name = value; 

        }  

    }

    private int age;

    public int Age

    {

        get { return age; }   

        set {

            Console.WriteLine("Call set Age");

            age = value; 

        } 

    }

}