using System;

public class Program

{

    public static void Main()

    {

        new Platypus();;

    }

}

​

abstract class Mammal { 

    abstract public String chew(); 

    public Mammal() { 

        Console.WriteLine(chew()); // Does this line compile?

    }

}

​

class Platypus : Mammal { 

    override public String chew() { 

        return "stackoverflow"; 

    }  

}

​