using System;

​

public class Dog

{

    // Fields

    public string Breed;

    public string Size;

    public string Color;

    public int Age;

    // Constructor

    public Dog(string b, string s, string c, int a)

    {

        Breed = b;

        Size = s;

        Color = c;

        Age = a;

    }

    // Methods

    public void Bark()

    {

        Console.WriteLine(Breed + " barks!");

    }

}

​

public class Program

{

    public static void Main()

    {

        Dog d1 = new Dog("G. Shepherd", "Large", "Brown", 1);

        d1.Bark();

        Dog d2 = new Dog("Beagle", "Medium", "Spotted", 5);

        d2.Bark();

​

        Dog d3 = new Dog("Poodle", "Medium", "Black", 10);

        d3.Bark();

​

        Console.WriteLine("Hello World");

    }

}