Let's say I have some code:

var items = ItemsGetter.GetAllItems().Where(x => x.SomeProperty > 20);
int sum1 = items.Sum(x => x.SomeFlag == true);

And for example I need some other sum from the items collection later in the code.

int sum2 = items.Sum(x => x.OtherFlag == false);

So my question: Is it OK to call Linq methods on IEnumerable more than once? Maybe I should call Reset() method on enumerator or make list from items using ToList method?

c# linq ienumerable
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