I'm writing an Active Directory web service and need to return multiple
properties of a single user.  The web service receives the username and
looks up the properties of the user in Active Directory.  This works fine.

If I look-up the first name, last name, email, telephone, city, state, and
zip, should I create a dataset or create a user object in the service to
return to the client?  I am looking for the most efficient way to do this -
an on-the-fly dataset or serialization/deserialization of a user
class/object.

Thanks-
Michael