using System;

​

public class Animal 

{

}

​

public class Dog : Animal

{

}

​

​

public class Program

{

    public static void Main()

    {

        var a = new Animal();

        var d = new Dog();

        switch(a)

        {

        case Dog doggy:

            Console.WriteLine("a is dog");

            break;  

        case Animal ani:

            Console.WriteLine("a is animal");

            break;

        }       

        switch(d)

        {

        case Dog doggy:

            Console.WriteLine("d is dog");

            break;  

        }

        switch(d)

        {

        case Animal ani:

            Console.WriteLine("d is animal");

            break;

        }

    }

}