何时在面向 .NET 4.0 的应用中使用 IEqualityComparer
实施弱类型 IEqualityComparer 对我有什么好处.NET 4.0 应用程序中的 除了 IEqualityComparer接口？
另一个角度是，我始终可以实现 IEqualityComparerIEqualityComparer 来获取新代码。
Is there any benefit for me to implement the weakly typed IEqualityComparer in .NET 4.0 apps in addition to the IEqualityComparer<T> interface?
Another angle is I can always implement IEqualityComparer<System.Object> to make up an equally weakly typed scenario and never need to resort to IEqualityComparer for new code.
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如果您只是从
EqualityComparer那么您不必担心它，因为它同时实现了IEqualityComparer和IEqualityComparer。因此，当您实现强类型时，您可以免费获得弱类型。也就是说，您不太可能发现自己需要弱类型版本。只有少数 BCL 类使用它，而且它们并不常见。
If you just derive from
EqualityComparer<T>then you don't have to worry about it because it implements bothIEqualityComparerandIEqualityComparer<T>. So you get weak typing for free when you implement strong typing.That said, it's reasonably unlikely that you'll find yourself needing the weakly-typed version. Only a handful of BCL classes use it, and they're not common ones.