C＃继承 [英] C# inheritance

问题描述

让我们说我有下面的代码：

Let's say I have the following code:

interface ISomeInterface
{
    void DoSomething();
    void A();
    void B();    
}

public abstract class ASomeAbstractImpl : ISomeInterface
{
    public abstract void A();
    public abstract void B();
    public void DoSomething()
    {
        // code here
    }
}

public class SomeImpl : ASomeAbstractImpl 
{
    public override void A()
    {
        // code
    }

    public override void B()
    {
        // code
    }
}

的问题是，我希望有密封 ASomeAbstractImpl.DoSomething（）方法（最终），所以没有其他的类都可以实现它。
作为代码现在是 SomeImpl 可以有一个调用方法 DoSomething的（）键，可以被称为（它不会覆盖从抽象类的同名方法，因为这是没有标记为虚拟的），但我想切断 SomeImpl 类。

The problem is that i wish to have the ASomeAbstractImpl.DoSomething() method sealed (final) so no other class could implement it. As the code is now SomeImpl could have a method called DoSomething() and that could be called (it would not override the method with the same name from the abstract class, because that's not marked as virtual), yet I would like to cut off the possibility of implementing such a method in SomeImpl class.

这可能吗？

推荐答案

方法对C＃默认情况下密封。有，然而，什么可以做，以防止方法隐藏（暴露在派生类中具有相同名称的方法，常用的有新）

Methods in C# are sealed by default. There is, however, nothing you can do to prevent method hiding (exposing a method with the same name in the derived class, commonly with new).

或者，对于这个问题，接口重新实现：

Or, for that matter, interface-reimplementation:

static void Main()
{
    ISomeInterface si = new EvilClass();
    si.DoSomething(); // mwahahah
}

public class EvilClass : ASomeAbstractImpl, ISomeInterface
{
    public override void A() {}
    public override void B() { }
    void ISomeInterface.DoSomething()
    {
        Console.WriteLine("mwahahah");            
    }
}

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