static void Main(string[] args) { Person person = new Person(); person.Name = "Vince"; person.Introduce("Vanya"); person.Orders.Add(new Orders()); person.Orders.Add(new Orders()); Console.WriteLine("The number of purchases that user did " + person.Orders.Count); var person1 = Person.Parse("Vince"); person1.Introduce("Vanya"); person1.ShowYears(1999, 2000, 2005, 2010); int age; Person.Initialize(out age); var person2 = new Person("Vanya", age); Console.WriteLine(person2); }