using System;

using System.Collections.Generic;

using System.Linq;

public class Program

{

    public static void Main()

    {

        // GET ENTIRE DECK

        var deck = Deck.RandomDeck();

        // CREATE A NEW LIST TO HOLD OUR FILTERED RESULTS

        List<string> cardColors = new List<string>();

        // LOOP THROUGH THE DECK AND FILTER THE CARDS

        foreach (var card in deck) {

        }

        // LOOP THROUGH OUR FILTERED LIST AND PRINT THE CARD

        foreach(var color in cardColors) {

            Console.WriteLine(color);   

        }

    }

}

​

public class Card

{

    public Card(int value, string suit)

    {

        if (!Suits.Contains(suit)) throw new ArgumentException("Suit name not recognized", nameof(suit));

        this.Suit = suit;

        this.Value = value;

        this.Name = value.ToString();

        switch (value)

        {

            case 1:  this.Name = "Ace";  break;

            case 11: this.Name = "Jack"; break;

            case 12: this.Name = "Queen";break;

            case 13: this.Name = "King"; break;

        }

        this.Color = suit == "Clubs" || suit == "Spades" ? "Black" : "Red";

    }

​

    public int Value { get; set; }

    public string Name { get; set; }

    public string Suit { get; set; }

    public string Color { get; set; }

    public string Display => Name + " of " + Suit;

    public static string[] Suits => new string[] { "Clubs", "Spades", "Hearts", "Diamonds" };

}

​

public static class Deck

{

​

    public static IEnumerable<Card> OrderedDeck()

    {

        foreach (var suit in Card.Suits)

        {

            for (int i = 1; i <= 13; i++)

            {

                yield return new Card(i, suit);

            }

        }

    }

​

    public static IEnumerable<Card> RandomDeck()

    {

        Random rnd = new Random();

        return OrderedDeck().OrderBy(x => rnd.Next());

    }

}

​