是什么遮蔽？ [英] What is Shadowing?

问题描述

在C＃是什么术语的阴影的意思吗？我已阅读<一个href=\"http://stackoverflow.com/questions/392721/difference-between-shadowing-and-overriding-in-c\">this链接但并没有完全理解。

In C# what does the term shadowing mean? I have read this link but didn't fully understand it.

推荐答案

阴影隐藏在基类中的方法。使用中的问题，你链接的例子：

Shadowing hides a method in a base class. Using the example in the question you linked:

class A 
{
   public int Foo(){ return 5;}
   public virtual int Bar(){return 5;}
}
class B : A
{
   public new int Foo() { return 1;}
   public override int Bar() {return 1;}
}

类 B 的重写的虚拟方法酒吧。它的隐藏的（阴影）非虚方法富。覆盖使用替换关键字。阴影与新关键字完成的。

Class B overrides the virtual method Bar. It hides (shadows) the non-virtual method Foo. Override uses the override keyword. Shadowing is done with the new keyword.

在上面的code，如果你定义在类中的富方法时没有使用新关键字 B ，你会得到这个编译器警告：

In the code above, if you didn't use the new keyword when defining the Foo method in class B, you would get this compiler warning:

'test.B.Foo()' hides inherited member 'test.A.Foo()'. Use the new keyword if hiding was intended.

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