值类型与引用类型的区别

和上一篇一样，先做一道题，检测一下自己的基本功

 static void Main(string[] args)
        {
            User user1 = new User { Name = "zjf", Age = 24 };
            int age = user1.Age;
            user1.Age = 25;
            string name = user1.Name;
            user1.Name = "ljy";
            User user2 = new User { Name = "zjf", Age = 24 };
            User user = user2;
            user.Name = "ljy";
            user.Age = 25;
            Console.WriteLine("age=" + age);
            Console.WriteLine("user1.Age=" + user1.Age);
            Console.WriteLine("name=" + name);
            Console.WriteLine("user1.Name=" + user1.Name);
            Console.WriteLine();
            Console.WriteLine("user2.Name="+user2.Name);
            Console.WriteLine("user2.Age="+user2.Age);
            Console.ReadLine();
        }

        public class User
        {
            public string Name { get; set; }
            public int Age { get; set; }
        }