static void Main(string[] args)
{
Person person = new ConcretePerson("Sergey", "Sergeev", 2);
person.IntroduceYourself(person);
Console.WriteLine();
person.Age = 30;
person.IntroduceYourself(person);
Console.WriteLine();
Person studentPerson = new StudentConcretePerson("Petr", "Petrov", 24, 3);
studentPerson.IntroduceYourself(studentPerson);
Console.WriteLine();
Person extramuralStudentPerson = new ExtramuralStudentConcretePerson("Ivan", "Ivanov", 20,2);
extramuralStudentPerson.IntroduceYourself(extramuralStudentPerson);
Console.ReadKey();
}
static void Main(string[] args)
{
Person person = new ConcretePerson("Sergey", "Sergeev", 2);
person.IntroduceYourself(person);
Console.WriteLine();
person.Age = 30;
person.IntroduceYourself(person);
Console.WriteLine();
Person studentPerson = new StudentConcretePerson("Petr", "Petrov", 24, 3);
studentPerson.IntroduceYourself(studentPerson);
Console.WriteLine();
Person extramuralStudentPerson = new ExtramuralStudentConcretePerson("Ivan", "Ivanov", 20, 2);
extramuralStudentPerson.IntroduceYourself(extramuralStudentPerson);
Console.ReadKey();
}