C#模板方法模式

模板方法模式是通过把不变行为搬移到超类，而超类一定会定义为虚类虚方法，虚方法在每个子类中重写，去除子类中的重复代码来体现它的优势。

通用模式样例代码为：

 1 /*
 2  * Created by SharpDevelop.
 3  * User: home
 4  * Date: 2013/4/24
 5  * Time: 21:42
 6  *
 7  * To change this template use Tools | Options | Coding | Edit Standard Headers.
 8  */
 9 using System;
10
11 namespace template
12 {
13     abstract class AbstractClass
14     {
15         public abstract void PrimitiveOperation1();
16         public abstract void PrimitiveOperation2();
17
18         public void TemplateMethod()
19         {
20             PrimitiveOperation1();
21             PrimitiveOperation2();
22             Console.WriteLine("");
23         }
24     }
25
26     class ConcreteClassA : AbstractClass
27     {
28         public override void PrimitiveOperation1()
29         {
30             Console.WriteLine("具体类A方法1实现。");
31         }
32         public override void PrimitiveOperation2()
33         {
34             Console.WriteLine("具体类A方法2实现。");
35         }
36     }
37
38     class ConcreteClassB : AbstractClass
39     {
40         public override void PrimitiveOperation1()
41         {
42             Console.WriteLine("具体类B方法1实现。");
43         }
44         public override void PrimitiveOperation2()
45         {
46             Console.WriteLine("具体类B方法2实现。");
47         }
48     }
49
50     class Program
51     {
52         public static void Main(string[] args)
53         {
54             AbstractClass c;
55
56             c = new ConcreteClassA();
57             c.TemplateMethod();
58
59             c = new ConcreteClassB();
60             c.TemplateMethod();
61
62             Console.Read();
63         }
64     }
65 }