using System;

​

public class Program

{

    public static void Main()

    {

        Animal target = new Human();

        Feed(target);

    }

    private static void Feed(Animal animal){

        Console.WriteLine("Trying to feed an animal");

        animal.Feed();

    }

    private static void Feed(Human animal){

        Console.WriteLine("Cooking. Trying to feed a human animal");

        animal.Feed();

    }

}

​

public class Animal

{

    public virtual void Feed()

    {

        Console.WriteLine("Toss food at animal");

    }

}

​

public class Human : Animal

{

    public override void Feed()

    {

        Console.WriteLine("cook food first, then toss at animal");

    }

}