using System;

using AutoMapper;       

​

public class Program

{

    public static void Main()

    {       

        var o = new Order();

        o.Code = "1";

        dynamic x = o;

        x.Test = "2";

        Console.WriteLine(x.Code);

    }

}

​

public class Order

{

    public string Code { get; set; }

}

​

​