Card.cs

public class Card
{

    public static Card[] BuildDeck ()
    {
        Suit[] suits = (Suit[])Enum.GetValues (typeof (Suit));
        Number[] numbers = (Number[])Enum.GetValues (typeof (Number));
        Card[] deck = new Card[suits.Length * numbers.Length];
        for (int i=0; i<suits.Length; i++)
            for (int j=0; j<numbers.Length; j++)
                deck[i*numbers.Length + j] = new Card (suits[i], numbers[j]);
        return deck;
    }

    public Suit Suit
    {
        get; private set;
    }

    public Number Number
    {
        get; private set;
    }

    public Card (Suit suit, Number number)
    {
        Suit = suit;
        Number = number;
    }
}

public enum Suit
{
    Heart,
    Diamond,
    Spade,
    Club
}

public enum Number
{
    Ace,
    Two,
    Three,
    Four,
    Five,
    Six,
    Seven,
    Eight,
    Nine,
    Ten,
    Jack,
    Queen,
    King

}