public bool AddPerson(Persona Person) { if (People.Count > 0) { foreach (Persona Dude in People) { if (Dude.GetRUT() == Person.GetRUT()) { Console.WriteLine("A person with this RUT already exists."); return(false); } } } People.Add(Person); Console.WriteLine("Person " + Person.GetName() + " created successfully."); return(true); }