Question

Resharper says I can but I don’t see how. There are several examples of the form:

foreach (ItemType Item in ListOfItems)
    if (ConditionalInvolvingItem)
        Total += ItemProperty;

Of course I could make a sublist on the conditional and then sum the items in the sublist but this would be no clearer and would run slower.

Answer 1

ReSharper is a handy tool, but keep in mind its suggestions aren’t always necessarily more performant or self-explanatory. Such is the case here. It’s really a toss-up. I’m sure you already have a LINQ statement in mind, but I’d imagine this example would look as such:

var Total = (from Item in ListOfItems
    where (ConditionalInvolvingItem)
    select ItemProperty).Sum();