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)