public void ShuffleDeck()
{
var rnd = new Random();
var rndDeck = new CardDeck();
rndDeck.Clear();
while (Deck.Count > 0)
{
var rndThis = rnd.Next(Deck.Count);
rndDeck.Add(Deck[rndThis]);
Deck.Remove(Deck[rndThis]);
}
Deck = rndDeck;
}