判断是否为同一对象

普通的引用类型比较:

 1  //运行结果都是false,这个没有要说明的,因为p1跟p2存储的指向堆中的实例地址不一样.不是同一个对象
 2             Person p1 = new Person
 3             {
 4                 Name = "XXX",
 5                 Age = 18,
 6                 Email = "XXX@yahoo.com"
 7             };
 8 
 9             Person p2 = new Person
10             {
11                 Name = "XXX",
12                 Age = 18,
13                 Email = "XXX@yahoo.com"
14             };
15             //p2 = p1;
16            Console.WriteLine(p1 == p2); 
17            Console.WriteLine(p1.Equals(p2));
18            Console.WriteLine(ReferenceEquals(p1, p2));
19            Console.ReadKey();

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