1 namespace ClassLesson
2 {
3 class Program
4 {
5 static void Main(string[] args)
6 {
7 var person = new Person(5);
8 Console.WriteLine(person.GetAge());
9 Console.WriteLine(Person.getFive()); //static
10 Console.WriteLine(person.Age);
11 person.Age = 10;
12 Console.WriteLine(person.Age);
13 Console.WriteLine(person.Age2);
14 person.Age2 = 10;
15 Console.WriteLine(person.GetAge());
16 Console.WriteLine(person.GetName());
17
18 Console.ReadLine();
19 }
20 }
21
22
23 //the default modifier is internal，can be accessed in the namespace
24 //the Class can only inherit one Class，but can inherit a great deal of Interface
25 class Person : Main, ISuper
26 {
27 int age;
28
29 public int Age //default value is 0
30 {
31 get;
32 set;
33 }
34
35 public int Age2
36 {
37 get
38 {
39 return age + 10;
40 }
41 set
42 {
43 age = value - 10;
44 }
45 }
46
47 public Person(int myAge) //constructed function
48 {
49 this.age = myAge;
50 }
51
52 public int GetAge() //the default modifier is private (in the Class)
53 {
54 return age;
55 }
56
57 public static int getFive() //static method be stored in the Class
58 {
59 return 5;
60 }
61
62 public int GetSuper()
63 {
64 return age = 100;
65 }
66
67 public override int GetAbstract()
68 {
69 return 50;
70 }
71 }
72
73 interface ISuper //only include method、property、index and event
74 {
75 int GetSuper(); //only need statement,the details in the Class
76 }
77
78 //abstract class=>can't be instantiated
79 //function:be inherited by other Class
80 abstract class Main
81 {
82 public string Name;
83 public string GetName()
84 {
85 return Name = "string";
86 }
87
88 public abstract int GetAbstract(); //abstract method's details must be in the Class which inherited this
89 }
90
91 /**
92 * the difference between Abstract Class and Interface:
93 * 1.
94 * Internal:all details be in the Class which inherited it
95 * Abstract Class:only 'abstract' details be in the Class which inherited it
96 * 2.
97 * Internal:can't have member variables and properties
98 * Abstract Class:all
99 * 3.
100 * Abstract Class:can't be instantiated
101 *
102 * the Class can only inherit one Class，but can inherit a great deal of Interface
103 */
104 }
