using System;

using System.Collections.Generic;

​

namespace Demo;

​

static class Program

{

    static void Main(string[] args)

    {

        var animals = new List<Animal>()

        {

            new Dog(),

            new Cat(),

            new Rabbit()

        };

​

        var handler = new Handler();

​

        foreach (var animal in animals)

        {

            handler.Handle(animal);

        }

    }

​

    public sealed class Handler

    {

        public void Handle(Animal animal)

        {

            handleImp((dynamic)animal);

        }

​

        void handleImp(Cat cat)

        {

            Console.WriteLine("Handling cat");

        }

​

        void handleImp(Dog dog)

        {

            Console.WriteLine("Handling dog");

        }

​

        void handleImp(Animal animal)

        {

            Console.WriteLine("Handling unrecognised animal");

        }

    }

}

​

public abstract class Animal

{

    public void Update() { }

}

​

public class Dog : Animal

{

}

​

public class Cat : Animal

{

}

​

public class Rabbit: Animal

{

}

​