1 namespace Inheritance
2 {
3 class Program
4 {
5 static void Main(string[] args)
6 {
7 Dog dog = new Dog();
8 dog.Age = 10;
9 dog.Bite();
10 dog.GetAge();
11 dog.BiteMan();
12 Dog oldDog = new Dog(10);
13
14
15 Animal dog2 = new Dog();
16 dog2.Bite();
17 dog2.BiteMan();
18 ((Dog)(dog2)).BiteMan(); //casts
19 Console.ReadLine();
20 }
21 }
22
23 public class Animal
24 {
25 public int Age
26 {
27 get;
28 set;
29 }
30 public Animal() //constructor
31 {
32 Console.WriteLine("Animal constructure");
33 }
34
35 public Animal(int age)
36 {
37 Console.WriteLine("Old Animal");
38 this.Age = age;
39 }
40
41 public virtual void Bite() //virtual can be override when it be inherited
42 {
43 Console.WriteLine( "Animal bite");
44 }
45 public virtual void GetAge()
46 {
47 Console.WriteLine(Age);
48 }
49
50 public void BiteMan() //can't be overrided without virtual
51 {
52 Console.WriteLine("Animal bite man");
53 }
54 }
55 public sealed class Dog : Animal //sealed：can't be inherited
56 {
57 public Dog() //constructor
58 {
59 Console.WriteLine("Dog constructure");
60 }
61 public Dog(int age):base(age) //call specific function
62 {
63 Console.WriteLine("Old Dog");
64 this.Age = age;
65 }
66 public override void Bite() //override the parent class method
67 {
68 Console.WriteLine("Dog bite");
69 }
70
71 public new void BiteMan() //new:new method which is as same as the parent class method,not override
72 {
73 Console.WriteLine("Dog bite man");
74 }
75 }
76 }
