2 using System.Collections.Generic;
6 static int[] x = new int[] {100, 200};
10 IEnumerator<int> enumerator = X<int>.Y (x);
12 while (enumerator.MoveNext ())
13 sum += enumerator.Current;
18 if (X<int>.Z (x, 0) != 100)
21 if (X<int>.Z (x, 1) != 200)
30 public static IEnumerator<T> Y (IEnumerable <T> x)
32 return x.GetEnumerator ();
35 public static T Z (IList<T> x, int index)