public static void Main(string[] args) { // Person1 Person1 p1 = new Person1("Jack", 28); p1.name = "Jill"; Console.WriteLine(p1.age); // Person2 Person2 p2 = new Person2("Jack", 28); p2.SetName("Jill"); Console.WriteLine(p2.GetAge()); // Person3 Person3 p3 = new Person3("Jack", 28); p3.Name = "Jill"; Console.WriteLine(p3.Age); Person4 p4 = new Person4("Jack", 28); //p4.Name = "Jill"; Console.WriteLine(p4.Age); // Person5 Person5 p5 = new Person5("Jack", 30); p5.Age = -5; Console.WriteLine(p5.Age); }