LINQ side effects

is it possible to substitute a foreach loop with a lambda expression in LINQ (.Select))?

List<int> l = {1, 2, 3, 4, 5};
foreach (int i in l)
    Console.WriteLine(i);

To:

List<int> l = {1开发者_如何学Go, 2, 3, 4, 5};
l.Select(/* print to console */);

---

There is no Linq equivalent of foreach, although it is fairly easy to implement one yourself.

Eric Lippert gives a good description here of why this was not implemented in Linq itself.

However, if your collection is a List (which it appears to be in your example), you can use List.ForEach:

myList.ForEach(item => Console.WriteLine(item));

---

For any IEnumerable, you can do:

items.Any(item =>
{
    Console.WriteLine(item);
    return false;
}

But this would be utterly wrong! It's like using a shoe to hammer the nail. Semantically, it does not make sense.

---

Use List.ForEach instead.

---

You can use the List<T>.ForEach method.

l.ForEach(i => Console.WriteLine(i));

---

List.ForEach uses action delegate. Henceforth that will the right choice.