using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

        Phone iphone = new Phone();

        iphone.color = "blue";

        iphone.changePrice(0);

        Console.WriteLine(iphone.getPrice());

    }

}

​

public class Phone

{

    public string color;

    public int price = 999;

    // width, height, weight, dateReleased, popularity, rating, model etc....

    public int getPrice(){

        return price;

    }

    public void changePrice(int newPrice) {

        price = newPrice;

    }

    // change widht

    // chang height

    // get area of phone (width * height)

    // get popularity

    // change populary

    // get rating

    // get model

    //

}•