What's the best strategy for Equals and GetHashCode?

Question

I\'m working with a domain model and was thinking about the various ways that we have to implement these two methods in .NET. What is your preferred strategy?

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Answer 1

Hashcodes can collide so I don't think they are a good way to compare equality. You should compare the underlying values that make the objects "equal" instead. See @Jon Skeet's answer to this question: What is the best algorithm for an overridden System.Object.GetHashCode? for a better GetHashCode implementation if your equality encompasses several properties. If it's just a single property, you can just reuse it's hashcode.