public void EditConference(Conference element, string username, string password)
 {
     IManager<Conference> business = new ConferenceBusiness();
     business.Edit(element, username, password);
 }
 public int AddConference(Conference element, string username, string password)
 {
     IManager<Conference> business = new ConferenceBusiness();
     return business.Add(element, username, password);
 }