unbox

verb2

1. •
   To remove from a box.

   • The booksellers' tasks were to unbox, shelve, and handle cash. — 2005
2. •
   To retrieve (a value of a primitive type) from the object in which it is boxed.

   • When a boxing or unboxing operation occurs in code, whether it was implicit or explicit, the IL generated includes the box or unbox command. — 2004