为什么标记为在基类中隐藏实现的方法称为隐藏方法? [英] Why can a method marked that is hiding an implementation in the base class call the hidden method?

问题描述

我一直在阅读有关C#规范的内容，并遇到了一个我没有想到的场景，并希望有人可以分享一些经验.

I've been doing a little reading around the c# spec, and come across a scenario I didn't expect, and was hoping somebody could share some light.

我偶然发现了 new 关键字，用于将基类的成员隐藏在派生类中，随后对何时使用 new 而不是< virtual 成员上的code> override .

I stumbled across the new keyword for hiding members of a base class within a derived class, and subsequently a few discussions over when to use new as opposed to an override on a virtual member.

我在IDE中放入了一些代码示例，希望看到编译错误

I threw a little code sample in to my IDE, expecting to see a compilation error

public class BaseType
{
    public void method()
    {
        // do nothing
    }
}
public class DerivedType : BaseType
{
    public new void method()
    {
        base.method();
    }
}

，但是发现这是合法的C#.由于派生类隐藏了 method()的存在，为什么仍允许我调用它?

but instead found this to be legal c#. Since the derived class has hidden the presence of method(), why am I still allowed to call it?

欢呼

推荐答案

DerivedType 正在从将继承 DerivedType 的类中隐藏方法，而不是从其自身隐藏.
注意，要隐藏该方法，该类必须知道其父类中存在一个具有相同名称和参数的方法.因此，一类将方法隐藏在自己的作用域内是不合逻辑的.

The DerivedType is hiding the method from the classes which will be inheriting DerivedType, and not from itself.
Note that, to hide the method, the class has to know there exists a method in it's parent class with the same name and same arguments. Hence one class hiding the method from it's own scope is illogical.

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