static void Main()
{
List<int> list = new List<int>();
list.Add();
list.Add();
list.Add();
List<int>.Enumerator e = list.GetEnumerator();
Write(e);
}
static void Write(IEnumerator<int> e)
{
while (e.MoveNext())
{
int value = e.Current;
Console.WriteLine(value);
}
}