셔플 ~_~

public static class ShuffleHelper 
{    
    public static void Shuffle<T>(List<T> list)
    {
        Random rnd = new Random();
        int n = list.Count;
        while (n > 1)
        {
            n--;
            int k = rnd.Next(n + 1);
            T value = list[k];
            list[k] = list[n];
            list[n] = value;
        }
    }
}

 
    public List<Card> cards { get; private set; }
 
    public CardManager()
    {
        cards = new List<Card>();
    }
 
    public void Make_all_cards()
    {
        for (int i = 0; i < 4; i++)//문양
        {
            for (int j = 1; j < 14; j++)//수
            {
                cards.Add(new Card(j, i));
            }
        }
    }
 
    public void Shuffle()
    {
        ShuffleHelper.Shuffle<Card>(this.cards);
    }