新和覆盖之间的区别？ [英] Difference between new and override?

问题描述

我有我想为所有的继承类方法的一些'基地'功能的基类

I have a base class which I want to provide some 'base' functionality for methods for all inheriting classes.

在我的继承类我想做的事：

In my inheriting classes I want to do:

public override void Setup()
{
   base.Setup();
}

但此刻它说我必须使用new关键字。

But at the moment it says I have to use the new keyword.

如何到我，所以我必须使用覆盖关键字？

How to I have it so I have to use the override keyword?

有与当前正在使用的新关键字，并使用覆盖它是如何与我有什么区别？

Is there any difference between how it is currently with me using the new keyword and using override?

推荐答案

这是这么说的，因为你没有声明的基方法虚拟 。一旦你这样做，基虚拟 /派生覆盖对关键字才有意义。眼下，编译器抱怨，你不能覆盖非 - 虚拟法

It says so because you have not declared the base method virtual. Once you do so, the base virtual/derived override pair of keywords will make sense. Right now, the compiler is complaining that you cannot override a non-virtual method.

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