Inheritance: System.EventArgs
        protected void OnPersonSelected (object sender, PersonEventArgs args)
        {
            if (people.Add (args.Person))
            {
                peopleList.PackStart (new PersonRow(args.Person, OnRemoved));
                peopleList.ShowAll ();
            }

            return;
        }
        protected void OnPersonSelected (object sender, PersonEventArgs args)
        {
            Person = args.Person;

            return;
        }