Safely checking non-repeatable IEnumerables for emptiness

Question

There are times when it\'s helpful to check a non-repeatable IEnumerable to see whether or not it\'s empty. LINQ\'s Any doesn\'t work well

Answer 1

This is not an efficient solution if the enumeration is long, however it is an easy solution:

var list = input.ToList();
if (list.Count != 0) {
    foreach (var item in list) {
       ...
    }
}