3 public class ClassA
{};
6 public static int Main () {
7 UnboxerStruct
<ClassA
> us
;
8 Unboxer
<ClassA
> u
= new Unboxer
<ClassA
> ();
12 if (u
.unbox ((object)us
).field
!= 123)
14 if (u
.unboxNullable ((object)us
).Value
.field
!= 123)
16 if (u
.unboxNullable (null) != null)