using System;

​

public class Program

{

    public static void Main()

    {

        var creature = new Mammal{Age = 42};

        var oldDog = new Dog(creature);

        oldDog.Name = "Scruffy";

        Console.WriteLine("{0} is {1} years old.", oldDog.Name, oldDog.Age);

    }

}

​

public class Mammal

{

    public int Age

    {

        get;

        set;

    }

}

​

public class Dog : Mammal

{

    public Dog()

    {

    //Do nothing

    }

​

    public Dog(Mammal mammal)

    {

        //Set properties on Dog that come from this Mammal

        this.Age = mammal.Age; //Want to use automapper instead of doing this for every property.

        var mapper = ConfigureAutoMapper().CreateMapper();

        mapper.Map<Mammal, Dog>(mammal, this);

    }

​

    private AutoMapper.MapperConfiguration ConfigureAutoMapper()

    {

        return new AutoMapper.MapperConfiguration(cfg => {

            cfg.CreateMap<Mammal, Dog>();

        });

    }

    public string Name

    {

        get;

        set;

    }

}