Answer by Rhames for LINQ equivalent of foreach for IEnumerable

You could use the FirstOrDefault() extension, which is available for IEnumerable<T>. By returning false from the predicate, it will be run for each element but will not care that it doesn't actually find a match. This will avoid the ToList() overhead.

IEnumerable<Item> items = GetItems();
items.FirstOrDefault(i => { i.DoStuff(); return false; });