3 public static class ApplicationContext
10 public static int Main ()
12 bool? debugging
= false;
13 debugging
= debugging
| Foo ();
15 bool res
= debugging
.Value
;
20 debugging
= debugging
& Foo ();
24 int? re
= 3 + (short?) 7;
30 int? c
= (byte?)a
+ b
;