如何在c＃中限制基类成员对不同子类的访问 [英] how to restrict the access of members of a base class to different child classes in c#

问题描述

我有一个A类，有3种方法M1，M2，M3。

B类继承自A类，C类继承自B类。



现在A类的所有方法都可以用于B类和C类。



现在我想限制

1）B级的A级M1和M2

2）C级的M3。



我该怎么办？

I have a class A with 3 methods M1,M2,M3.
Class B is inherited from Class A & Class C is inherited from Class B.

Now all the methods in Class A are accessible for Class B & Class C.

Now i want to restrict
1)M1 & M2 of Class A for Class B
2)M3 for Class C .

How can i do this.

推荐答案

你不能。你不应该，即使有可能。没有意义 - 你为什么要那样做？如果M1和M2特定于B和M3特定于C，则在B中实现M1和M2，在C中实现M3。



这将违反多态性 [ ^ ]：如果像基类一样使用它，子类应该像基类一样。如果B级无法访问M3，那么你将无法像A级一样使用它。

You can't. And you shouldn't, even if it was possible. It makes no sense - why would you want to do that? If M1 and M2 are specific to B and M3 specific to C, then implement M1 and M2 in B and M3 in C.

It would violate the principle of polymorphism[^]: A subclass should behave like the baseclass if it is being used like the baseclass. If a B-class doesn't have access to M3 then you wouldn't be able to use it like an A-class.

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