显示接口成员

如下面的IDrivable和IStreerable都声明了TurnLeft()方法

public interface IDrivable

{

　　void TurnLeft();

}

public interface IStreerable

{

　　void TurnLeft();

}

如果声明一个类实现这两个接口，在类中必须定义两个TurnLeft()方法，如何区别这两个方法呢？答案是：必须显示声明这个方法属于哪个接口，如下例：

 1 /*
 2   Example8_7.cs illustrates an explicit interface member
 3   implementation
 4  */
 5 
 6  using System;
 7 
 8 
 9 // define the IDrivable interface
10 public interface IDrivable
11 {
12   void TurnLeft();
13 }
14 
15 
16 // define the ISteerable interface
17 public interface ISteerable
18 {
19   void TurnLeft();
20 }
21 
22 // Car class implements the IMovable interface
23 public class Car : IDrivable, ISteerable
24 {
25 
26   // explicitly implement the TurnLeft() method of the IDrivable interface
27   void IDrivable.TurnLeft()
28   {
29     Console.WriteLine("IDrivable implementation of TurnLeft()");
30   }
31 
32   // implement the TurnLeft() method of the ISteerable interface
33   public void TurnLeft()
34   {
35     Console.WriteLine("ISteerable implementation of TurnLeft()");
36   }
37 
38 }
39 
40 
41 class Example8_7
42 {
43 
44   public static void Main()
45   {
46 
47     // create a Car object
48     Car myCar = new Car();
49 
50     // call myCar.TurnLeft()
51     Console.WriteLine("Calling myCar.TurnLeft()");
52     myCar.TurnLeft();
53 
54     // cast myCar to IDrivable
55     IDrivable myDrivable = myCar as IDrivable;
56     Console.WriteLine("Calling myDrivable.TurnLeft()");
57     myDrivable.TurnLeft();
58 
59     // cast myCar to ISteerable
60     ISteerable mySteerable = myCar as ISteerable;
61     Console.WriteLine("Calling mySteerable.TurnLeft()");
62     mySteerable.TurnLeft();
63 
64   }
65 
66 }