why do i need GetHashcode() in the IEqualityComparer interface?
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25-09-2019 - |
Question
i see that the IEqualityComparer interface has Equals(obj x, obj y) and GetHashcode().
I fully understand the Equals() methods because i you have to say if two things are the same or not but why do i need to implement a GetHashCode() method as well?
Solution
It's needed for use in Hashtables - it's how the container indexes your objects
http://msdn.microsoft.com/en-us/library/system.object.gethashcode.aspx
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