static void Main(string[] args)
{
Person person = new Person();
Console.Out.WriteLine("Hello World!");
int age;
Console.Out.WriteLine("\n\nFirst Name : ");
String firstName = Console.ReadLine();
person.SetFirstName(firstName);
Console.Out.WriteLine("\nSecond Name : ");
String lastName = Console.ReadLine();
person.LastName = lastName;
Console.Out.WriteLine("\nAge : ");
age = Convert.ToInt32(Console.ReadLine());
person.Age = age;
person.PrintData();
}