2 using System
.Collections
.Generic
;
6 public static int Counter
= 0;
8 public struct Nested
: IDisposable
10 public int Current { get { return 1; }
}
11 public bool MoveNext ()
20 void IDisposable
.Dispose()
27 throw new ApplicationException ("error");
31 public Nested
GetEnumerator ()
37 public static class Program
39 public static int Main ()
43 foreach (int i
in t
) {
46 if (Test
.Counter
!= 1)