public void UpdatePerson(string lastName, Person updatedPerson)
 {
     proxy.UpdatePerson(lastName, updatedPerson);
 }
 public void UpdatePerson(string lastName, Person updatedPerson)
 {
     throw new NotImplementedException();
 }
 public void AddPerson(Person newPerson)
 {
     proxy.AddPerson(newPerson);
 }
 public void AddPerson(Person newPerson)
 {
     throw new NotImplementedException();
 }