using System;

using System.Collections.Generic;

using System.Linq;

using AutoMapper;

​

public class OrderLine1

{

    public string Product { get; set; }

    public decimal Price { get; set; }

    public decimal Quantity { get; set; }

    public decimal SubTotal { get; set; }

}

​

public class OrderLine2

{

    public string Product { get; set; }

    public decimal Price123 { get; set; }

    public decimal Quantity { get; set; }

    public decimal SubTotal123 { get; set; }

}

​

public class Order1

{

    public string Name { get; set; }

    public IEnumerable<OrderLine1> OrderLines { get; set; } = Enumerable.Empty<OrderLine1>();

}

​

public class Order2

{

    public string Name { get; set; }

    public IEnumerable<OrderLine2> OrderLines { get; set; } = Enumerable.Empty<OrderLine2>();

}

public class Program

{

    public static void Main()

    {

        var config = new MapperConfiguration(cfg => {

            cfg.CreateMap<Order1, Order2>();

            cfg.CreateMap<OrderLine1, OrderLine2>()

                .ForMember(dest => dest.Price123, opt => opt.MapFrom(src => src.Price))

                .ForMember(dest => dest.SubTotal123, opt => opt.MapFrom(src => src.SubTotal));

        });

        Console.WriteLine("Hello World");

    }

}