c＃是否与Java with equals和gethashcode（）有相同的问题？

Question

Does c# have the same issues like Java with equals and gethashcode?

issues like: http://onjava.com/pub/a/onjava/2006/09/13/dont-let-hibernate-steal-your-identity.html

Answer 1

If you mean that equality is hard to define when it comes to inheritance, yes.

However, .NET has the IEqualityComparer<T> interface which is frequently used for equality and hashing - for containers such as Dictionary<TKey, TValue> . Almost everything in the framework which needs equality/hashing allows the behaviour to be specified by an IEqualityComparer<T> , which means you can express whichever notion of equality you want, if the form given by the type itself is inappropriate for your needs.

Answer 2

Not sure which issues you're talking about since you're a little vague...

But if you mean that you have should (if you don't want a compiler warning, or possibly unexpected behavior in your code) to override GetHashCode when you override Equals , then yes.