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Alex Rivera
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I really like Last() and would use it all the time for List<T> s. But since it seems to be defined for IEnumerable<T> , I guess it enumerates the enumeration first. This should be O(n), as opposed to O(1) for directly indexing the last element of a List<T> . Are the standard (LINQ) extension methods aware of this? The STL in C++ is aware of this by virtue of a whole "inheritance tree" for iterators and whatnot.
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