using System;

using AutoMapper;

using System.ComponentModel;

​

public class Person

{

    public string FirstName { get; set; }

    public string LastName { get; set; }

    public int Age { get; set; }

    public string Address { get; set; }

    public string Email { get; set; }

}

​

public class PersonVM

{

    public string Name { get; set; }

    public int Age { get; set; }

    public string Address { get; set; }

    public string Email { get; set; }

}

​

​

public class Program

{

    public static void Main()       

    {

        var config = new MapperConfiguration(cfg => { 

            cfg.CreateMap<Person, PersonVM>().ForMember(dest=>dest.Name, opt => opt

                                                        .ResolveUsing( src =>{ return src.FirstName + " " + src.LastName;})

                                                       );

        });

        IMapper mapper = config.CreateMapper();

        var person = new Person { FirstName=null , LastName = "Dev", Age=10, Email = "test@test.com", Address="Test Address" };

        var personVM = mapper.Map<PersonVM>(person);

        Console.WriteLine("\nperson.FirstName : {0} \nperson.LastName : {1} \nperson.Age : {2} \nperson.Address : {3} \nperson.Email : {4}", person.FirstName, person.LastName, person.Age, person.Email, person.Address);

        Console.WriteLine("\npersonVM.Name : {0} \npersonVM.Age : {1} \nperson.Address : {2} \nperson.Email : {3}", personVM.Name, personVM.Age, personVM.Email, personVM.Address);

    }

}