using System;

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Lets Play Cards!");

        Console.WriteLine();

        // Get a new deck of cards

        Deck myDeck = new Deck();

        Console.WriteLine("Show the whole deck:");

        myDeck.PrintDeck();

        Console.WriteLine();

        Console.WriteLine("Shuffle the deck:");

        myDeck.Shuffle();

        myDeck.PrintDeck();

    }

}

​

public enum Suit : int

{

    Red = 1,

    Blue = 2,

    Green = 3,

    Yellow = 4

}

​

public class Deck

{

    private const int LENGTH_OF_SUIT = 10;

    private List<Card> deckList = new List<Card>();

    public Deck()

    {

        BuildDeck();

    }

​

    private void BuildDeck()

    {

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

        {

            for(int number = 1 ; number <= LENGTH_OF_SUIT; number ++)

            {

                deckList.Add(new Card(suit, number));

            }

        }

    }

    public void Shuffle()

    {

        // simple shuffle using Random to pick 2 indexes and swap the cards

        // we'll do this replacement operation also a random number of times between 10 and 50

        Random rand = new Random();

        int maxSwaps = rand.Next(10,50); // this will produce a number greater than or equal to 10, but LESS than 50

        for(int swapOperation = 0 ; swapOperation < maxSwaps ; swapOperation ++)

        {

            int from = rand.Next(deckList.Count); 

            int to = rand.Next(deckList.Count); 

            if (from != to)

            {

                Card temp = deckList[to];

                deckList[to] = deckList[from];

                deckList[from] = temp;

            }

        }

    }   

    public void PrintDeck()

    {

        foreach(var card in deckList)

        {

            Console.WriteLine("{0} {1} = {2}", card.Suit, card.Number, card.Value);

        }

    }

}

​

public class Card

{

    public Suit Suit { get; private set; }

    public int Number { get; private set; }

​

    public Card (Suit suit, int number)

    {

        this.Suit = suit;

        this.Number = number;

    }

    public int Value { get { return (int)Suit * Number; } }

}