Enumerator Implementation: Use struct or class?

Question

I noticed that List defines its enumerator as a struct, while ArrayList defines its enumerator as a class. What\'s t

Answer 1

Write it using yield return.

As to why you might otherwise choose between class or struct, if you make it a struct then it gets boxed as soon as it is returned as an interface, so making it a struct just causes additional copying to take place. Can't see the point of that!