1 using System;
2
3 class SubSystem_class1
4 {
5 public void OperationX()
6 {
7 Console.WriteLine("SubSystem_class1.OperationX called");
8 }
9 }
10
11 class SubSystem_class2
12 {
13 public void OperationY()
14 {
15 Console.WriteLine("SubSystem_class2.OperationY called");
16 }
17 }
18
19 class SubSystem_class3
20 {
21 public void OperationZ()
22 {
23 Console.WriteLine("SubSystem_class3.OperationZ called");
24 }
25 }
26
27 class Facade
28 {
29 private SubSystem_class1 c1 = new SubSystem_class1();
30 private SubSystem_class2 c2 = new SubSystem_class2();
31 private SubSystem_class3 c3 = new SubSystem_class3();
32
33 public void OperationWrapper()
34 {
35 Console.WriteLine("The Facade OperationWrapper carries out complex decision-making");
36 Console.WriteLine("which in turn results in calls to the subsystem classes");
37 c1.OperationX();
38 if (1==1 /*some really complex decision*/)
39 {
40 c2.OperationY();
41 }
42 // lots of complex code here . . .
43 c3.OperationZ();
44 }
45
46 }
47
48 /// <summary>
49 /// Summary description for Client.
50 /// </summary>
51 public class Client
52 {
53 public static int Main(string[] args)
54 {
55 Facade facade = new Facade();
56 Console.WriteLine("Client calls the Facade OperationWrapper");
57 facade.OperationWrapper();
58 return 0;
59 }
60 }