无法使用 “使用”

Question

给出两个接口，如这些时隐式转换为System.IDisposable：

public interface MyInterface1 : IDisposable 
{ 
    void DoSomething(); 
} 

public interface MyInterface2 : IDisposable 
{ 
    void DoSomethingElse(); 
} 

...和实现类是这样的：

public class MyClass : IMyInterface1, IMyInterface2 
{ 
    public void DoSomething()  { Console.WriteLine("I'm doing something..."); } 
    public void DoSomethingElse() { Console.WriteLine("I'm doing something else..."); } 
    public void Dispose()   { Console.WriteLine("Bye bye!"); } 
} 

...我倒是假设下面的代码片段应该编译：

class Program 
{ 
    public static void Main(string[] args) 
    { 
      using (MyInterface1 myInterface = new MyClass()) { 
       myInterface.DoSomething(); 
      } 
    } 
} 

...相反，我总是收到以下错误信息：

Error 1 'IMyInterface1': type used in a using statement must be implicitly convertible to 'System.IDisposable' 

任何想法？谢谢。

Answer 1

您应该（也）看到关于Dispose()未公开的编译器错误。

public class MyClass : IMyInterface1, IMyInterface2 
{ 
    public void DoSomething()  { Console.WriteLine("I'm doing something..."); } 
    public void DoSomethingElse() { Console.WriteLine("I'm doing something else..."); } 
    void Dispose()    { Console.WriteLine("Bye bye!"); } 
} 

该类中的Dispose()方法无法实现IDisposable，所以必须有更多的东西怎么回事。

Answer 2

正常工作

public interface IMyInterface1 : IDisposable 
{ 
    void DoSomething(); 
} 

public interface IMyInterface2 : IDisposable 
{ 
    void DoSomethingElse(); 
} 

public class MyClass : IMyInterface1, IMyInterface2 
{ 
    public void DoSomething() { Console.WriteLine("I'm doing something..."); } 
    public void DoSomethingElse() { Console.WriteLine("I'm doing something else..."); } 
    public void Dispose() { Console.WriteLine("Bye bye!"); } 
} 

class Program 
{ 
    public static void Main(string[] args) 
    { 
     using (IMyInterface1 myInterface = new MyClass()) 
     { 
      myInterface.DoSomething(); 
     } 
    } 
} 

你忘记了做Dispose()公众和接口的名字写错了（的IMyInterfaceXMyInterfaceX代替）

Ideone：http://ideone.com/WvOnvY