Card Card1 = new Card((Suit)1, (Rank)1);
            Card Card2 = Card1;
            Card Card3 = new Card((Suit)1, (Rank)1);
            if (Card1 == Card2)
                Console.WriteLine("Card1==Card2");
            if (Card1.Equals(Card2))
                Console.WriteLine("Card1 Equals Card2");
            if (Card1 == Card3)
                Console.WriteLine("Card1==Card3");
            if (Card1.Equals(Card3))
                Console.WriteLine("Card1 Equals Card3");

            Card1=new Card((Suit)2,(Rank)2);
            Console.WriteLine(Card1);
            Console.WriteLine(Card2);
            if (Card1 == Card2)
                Console.WriteLine("Card1==Card2");
            if (Card1.Equals(Card2))
                Console.WriteLine("Card1 Equals Card2");

Card1==Card2
Card1 Equals Card2
The Deuce of Hearts
The Ace of Diamonds
请按任意键继续. . .


为什么Card1与Card3，无论用==还是Equals都不相等呢
修改Card1的值也不影响Card2的值