using System;

​

class Animal

{

    public void PrintName(string name)

    {

        Console.WriteLine("The name of the animal is " + name);

    }

}

​

class Dog : Animal

{

    public void PrintBreed(string breed)

    {

        Console.WriteLine("The breed of the dog is " + breed);

    }

}

​

public class DowncastingExample

{

    public static void Main(string[] args)

    {

        Animal a = new Animal();

        // This will cause a compile-time error

        // Dog d = (Dog) a;

        // d.PrintBreed("Labrador"); // Error: Cannot implicitly convert type 'Animal' to 'Dog'

        Animal b = new Dog();

        if (b is Dog)

        {

            Dog e = (Dog)b;

            e.PrintBreed("Poodle");

        }

​

        a.PrintName("Tommy");

        b.PrintName("Rex");

    }

}