C#面向对象 类的封装

1  class student
 2     {
 3         public int _code;
 4         public int Code//属性
 5         {
 6             //获取值
 7             get
 8             {
 9                 return 5;
10             }
11             //设置值
12             set
13             {
14                 _code = value + 9;
15             }
16         }
17         private string _name;
18         public string Name
19         {
20             get { return _name; }
21             set { _name = value; }
22         }   
23     }
24
25 student s = new student();
26             s.Code = 3;
27             Console.WriteLine(s.Code);
28             Console.WriteLine(s._code);
29             Console.ReadLine();