Previously I created a service to seed an app with some initial members

public void AddMember(Member member)
{
      if (!_memberService.Exists(member.Username) && member.Username != null)
      {
            _memberService.CreateWithIdentity(member.Username, member.Email, member.Password, _memberService.GetDefaultMemberType());
      }
}

I have now extended the members via the back office to include details such as name, address, company etc.

How would I go about including these in the service? Is there a good how-to anywhere on this?

thanks