c# - LINQ and ReSharper -


hi have following code:

if (!_jobs.any(j => j.id == emailjob.id)) { }

this code should find elements satisfy condition. assume should return after finding first element, this:

if (!_jobs.firstordefault(j => j.id == emailjob.id) != null) { }

resharper tries simplify linq expression to:

if (_jobs.all(j => j.id != emailjob.id)) { }

this seems less efficient me because has check every single element satisifies inverse condition.

sorry if i'm misunderstanding how linq works.

joe

both any , all stop looking upon condition failing.

if looking more taking our word or anecdotal evidence, can see source doing.

decompiled , methods

there inversion in all method after predicate applied. relative 0 performance impact, code readability main concern.


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