public void Shuffle()
{
Random rnd = new Random();
int n = allPlayingCards.Count;
while (n > 1)
{
n--;
int k = rnd.Next(n + 1);
PlayingCard randomCard = allPlayingCards[k];
allPlayingCards[k] = allPlayingCards[n];
allPlayingCards[n] = randomCard;
}
}
public void AddCard(PlayingCard card)
{
cards.Add(card);
}