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Alex Rivera
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I'm looking for rules of thumb for calling ToList/ToArray/MemoizeAll(Rx) on IEnumerables , as opposed to returning the query itself when returning IEnumerable of something. Often I find that it is better to just return the query and let the caller decide whether a list is needed or not, but sometimes it can come back and bite you in the rear due to the lazy nature of linq. I want to collect guidelines such as: Call ToList if: you create new objects (eg. in a select) you have side effects in your query Otherwise, return the query
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