常用的设计模式  有23种

(1).简单工厂设计模式

1. namespace _03.简单工厂模式
2. {
3. class Program
4. {
5. static void Main(string[] args)
6. {
7. Console.WriteLine("请输入您想要的笔记本品牌.");
8. string brand = Console.ReadLine();
9. NoteBook nb=GetNoteBook(brand);
10. nb.SayHello();
11. Console.ReadKey();
13. }
15. public static NoteBook GetNoteBook(string brand)
16. {
17. NoteBook nb=null;
18. switch (brand)
19. {
20. case "Acer":
21. return nb = new Acer();
22. case "Lenovo":
23. return nb = new Lenovo();
24. case "IBM":
25. return nb = new IBM();
26. case "Dell":
27. return nb = new Dell();
28. }
29. return nb;
30. }
31. }
33. public abstract class NoteBook
34. {
35. public abstract void SayHello();
36. }
38. public class Lenovo : NoteBook
39. {
40. public override void SayHello()
41. {
42. Console.WriteLine("我是联想笔记本");
43. }
44. }
46. public class IBM : NoteBook
47. {
48. public override void SayHello()
49. {
50. Console.WriteLine("我是IBM笔记本");
51. }
52. }
54. public class Dell : NoteBook
55. {
56. public override void SayHello()
57. {
58. Console.WriteLine("我是IBM笔记本");
59. }
60. }
62. public class Acer : NoteBook
63. {
64. public override void SayHello()
65. {
66. Console.WriteLine("我是鸿基电脑");
67. }
68. }
69. }