10 public static bool operator == (S s, S i)
12 throw new ApplicationException ();
15 public static bool operator != (S s, S i)
17 throw new ApplicationException ();
20 public static implicit operator int? (S s)
22 throw new ApplicationException ();
25 public static implicit operator E? (S s)
33 public static int Main ()
69 Console.WriteLine ("ok");