Depends on what you mean by that. You can read it from the database
and put it in the form; you can read it from the form and put it into
the database. A little databinding in the middle makes it happen
automatically.
Actually, Binary Serialization isn't good enough; you can still see some of
the data. You need to check out the Encryption classes in .Net. Check out
MSDN and search for Encryption or cryptography.