using System;

using System.Collections.Generic;

using System.Linq;

​

​

public class Program

{

    public class Animal 

    {

    }

​

    public class Cat : Animal 

    {

    }

​

    public static void Main()

    {   

        string WhoAmI(Animal a) => a.GetType().Name;

        var cat = new Cat();

        Console.WriteLine(WhoAmI(cat));

    }

}