1 using System
.Collections
.Generic
;
7 static void Main(string[] args
)
9 foreach (bool b
in test())
12 throw new System
.Exception ();
15 static IEnumerable
<bool> setX()
25 static IEnumerable
<bool> test()
27 foreach (bool b
in setX()) {
29 // Change "goto label" to "break" to show the correct result.