/*public Card GetCard(int cardNum) * { * if (cardNum >= 0 && cardNum <= 51) * return cards[cardNum]; * else * throw (new System.ArgumentOutOfRangeException("cardNum",cardNum,"value must be between 0 and 51.")); * }*/ public void Shuffle() { //Card[] newDeck = new Card[52]; CardsCollection newDeck = new CardsCollection(); bool[] assigned = new bool[52]; Random sourceGen = new Random(); for (int i = 0; i < 52; i++) { //int destCard = 0; int sourceCard = 0; bool foundCard = false; while (foundCard == false) { sourceCard = sourceGen.Next(52);//Next(x)----生成一个介于0~x之间的随机数。 if (assigned[sourceCard] == false) { foundCard = true; } } assigned[sourceCard] = true; //newDeck[destCard] = cards[i]; newDeck.Add(cards[sourceCard]); } newDeck.CopyTo(cards); }