using System;

​

public abstract class Marketplace

{

    public abstract void NamaMarket();

    public abstract void EmailAkun();

}

​

public class Shopee : Marketplace

{

    public string nmMarket = "Will Market";

    public string emAkun = "WillMart@gmail.com";

​

    public override void NamaMarket()

    {

        Console.WriteLine("Nama Marketplace : " + nmMarket);

    }

​

    public override void EmailAkun()

    {

        Console.WriteLine("Email Akun       : " + emAkun);

    }

    public void identitas()

    {

        Console.WriteLine("========================");

        Console.WriteLine("        Willdan         ");

        Console.WriteLine("========================");

    }

}

​

public class Program

{

    public static void Main()

    {

        Shopee shopee = new Shopee();

        shopee.identitas();

        Console.WriteLine();

        shopee.NamaMarket();

        shopee.EmailAkun();

    }

}