2 using System.Collections;
3 using System.Collections.Generic;
7 public IEnumerator GetEnumerator ()
9 return new T[0].GetEnumerator ();
12 public IEnumerable<T> Filter (Func<T, bool> predicate)
14 foreach (T item in this)
22 public static void Main ()
24 foreach (var v in new C<long>().Filter(null)) {