public int Hyperlinq_List_Reference()
{
var sum = 0;
foreach (var item in ReadOnlyListExtensions.SelectMany <
ReadOnlyListExtensions.ValueEnumerableWrapper <int>, int,
ValueEnumerable.ReturnEnumerable <int>, ValueEnumerable.ReturnEnumerable <int> .DisposableEnumerator, int>(
ReadOnlyListExtensions.AsValueEnumerable <int>(listReference), item => ValueEnumerable.Return(item)))
{
sum += item;
}
return(sum);
}