public List<Note> GetCommonEvents(Person who)
 {
     return GetCommonEvents(who.NoteId);
 }
 public int InsertOrUpdatePerson(Person person)
 {
     return database.Table<Person> ().Where (x => x.NoteId == person.NoteId).Count () > 0
         ? database.Update (person) : database.Insert (person);
 }