C Sharp的结构 [英] Structures in C Sharp

问题描述

为什么默认情况下会密封结构?

Why Structures are Sealed by default?

推荐答案

出于简单的原因，您不能从任何值类型派生:仅引用类型. >
造成这种情况的实际原因很复杂，并且与复制值类型时发生的情况有关:您将获得按位克隆，而不是引用副本(因为您没有对值类型的引用).因此，如果可以通过基类型复制派生结构，则将获得基类型按位复制，而不是派生类型按位复制.现在您将丢失信息.

如果您真的有需要知道的话，请Google进行价值切片"，并准备小幅头痛！ :laugh:

For the simple reason that you can''t derive from any value type: only reference types.

The actual reason for this is complex, and has to do with what happens when you copy a value type: you get a bitwise clone, rather than a reference copy (because you don''t have a reference to a value type). So if you could copy a derived struct via it''s base type, you would get a base type bitwise copy, rather than a derived type bitwise copy. And now you would have lost information.

If you really feel the need to know, google for "Value slicing" and be prepared to get a small headache! :laugh:

http://www.csharpfriends.com/article/getarticle.aspx?articleid = 120 [ ^ ]

上面的链接将为您提供清晰的指导.

http://www.csharpfriends.com/articles/getarticle.aspx?articleid=120[^]

The Above Link will guide you clearly.

因为默认情况下它是密封的，所以没有析构函数，因为结构是在堆栈内存中创建的.

because by default it is sealed No destructor for struct because structures are created in stack memory.

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