using System;

using System.Collections.Generic;               

​

public class Program

{

    public static void Main()

    {

        var deck = new Deck();

        deck.Shuffle();

        foreach (var card in deck.Cards)

        {

            Console.WriteLine(card.ToString());

        }

    }

}

​

public enum Suit

{

    Hearts, Spades, Clubs, Diamonds

}

​

public enum Rank

{

    Two,Three, Four, Five, Six, Seven, Eight, Nine, Ten, Jack, Queen, King, Ace

}

​

public class Card

{

    public Suit Suit { get; set; }

    public Rank Rank { get; set; }

​

    public override string ToString() 

    {

        string suit = string.Empty;

        switch (Suit)

        {

            case Suit.Hearts:

                suit = "\u2665";

                break;

            case Suit.Spades:

                suit = "\u2660";

                break;

            case Suit.Clubs:

                suit = "\u2663";

                break;

            case Suit.Diamonds:

                suit = "\u2666";

                break;

        }

        return suit + " " + Rank;

    }

}

​

public class Deck

{

    public Deck()

    {

        Cards = new List<Card>();

        foreach (Suit suit in (Suit[])Enum.GetValues(typeof(Suit)))

        {

            foreach (Rank rank in (Rank[])Enum.GetValues(typeof(Rank)))

            {

                Cards.Add(new Card() { Suit = suit, Rank = rank });

            }

        }

    }

    public List<Card> Cards { get; set; }

​

    private static Random randomizer = new Random();

​

    //Please fill in this shuffle method

    public void Shuffle()

    {

    }

​

}