c# - Using LINQ First() method shows "Possible multiple iteration of IEnumerable" warning by Resharper -



c# - Using LINQ First() method shows "Possible multiple iteration of IEnumerable" warning by Resharper -

i have code this:

person firstperson = personsenumerable.first();

, personsenumerable ienumerable<person>

now, resharper underlines personsenumerable variable , says "possible iteration of ienumerable". understand warning means other questions here on so, i'm wondering why it's showing in example? think first() returns first element , there's no need iterate collection @ ?

is 'general' warning message not applicable in case (and can ignore it) or don't understand how first() works ?

yes, returns first element still creates enumerator first element.you add together toarray or tolist after where prevent this. if want first element, utilize overloaded version of first takes func delegate , can remove where.

c# linq resharper

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