using System;

​

public class Program

{

  class Animal

  {

    public int Legs { get; set; }

    public bool hasFur { get; set; }

​

    public Animal()

    {

      // Animal constructor

    }

  }

​

  class Dog : Animal {

    public string Name { get; set; }

​

    public Dog(string name) : base()

    {

      // Dog constructor

      Legs = 4;

      hasFur = true;

      Name = name;

    }

​

    public void Bark()

    {

      Console.WriteLine("Woof!");

    }

  }

​

  public static void Main()

  {

    Dog doggo = new Dog("Doggo");

    Console.WriteLine("{0} has {1} legs.", doggo.Name, doggo.Legs);

    // Doggo has 4 legs.

    doggo.Bark();

    // Woof!

  }

}