当你不使用泛型集合？ [英] When would you not use Generic Collections?

问题描述

使用泛型的优点是，它增加了类型安全 - 你只能放置在正确类型的东西，你得到了正确的类型，而无需转换。我能想到的不使用泛型集合的唯一原因是，你需要存储一些任意的数据。我失去了一些东西？有什么其他的原因在那里，当使用集合处理不使用泛型？

The advantage of using generics is that it increases the type safety - you can only put in the correct type of thing, and you get out the correct type without requiring a cast. The only reason I can think of for not using generic collections is that you need to store some arbitrary data. Am I missing something? What other reasons are there to not use generics when dealing with collections?

推荐答案

如果你需要存储的任意数据，使用名单，其中，对象＆gt; （或其他）。然后，这是绝对清楚的，它的的刻意的任意性。

If you need to store arbitrary data, use List<object> (or whatever). Then it's absolutely clear that it's deliberately arbitrary.

除此之外，我不会使用非泛型集合的任何东西。我的有无的使用的IEnumerable 和的IList 时，我已经转换了对象参考，不知道类型将其转换为在编译时 - 所以非一般的接口的是有用的，有时...但不非通用类本身。

Other than that, I wouldn't use the non-generic collections for anything. I have used IEnumerable and IList when I've been converting an object reference and didn't know the type to cast it to at compile-time - so non-generic interfaces are useful sometimes... but not the non-generic classes themselves.

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