using System;

​

namespace Program

{

    public class Program

    {

        public static void Main()

        {

            var lion = new Lion { Name = "Simba" };

            var tiger = lion.CreateMap<Tiger, Lion>(Cast);

            Console.WriteLine(tiger.FullName);

        }

        public static void Cast(Tiger dest, Lion src)

        {

            dest.FullName = src.Name;

        }

    }

    public class Lion

    {

        public string Name { get; set; }

    }

​

    public class Tiger

    {

        public string FullName { get; set; }

    }

}

​

namespace System {

    public static class ObjectExtensions {

        public static TDestination CreateMap<TDestination, TSource>(this TSource src, Action<TDestination, TSource> action) where TDestination : new()

        {

            var result = new TDestination();

            action(result, src);

            return result;

        }

    }

}