public static void Main() { var director = new SchoolMember("Ivanov", "director"); var assistantDirector = new SchoolMember("Zlatkov", "assistant director"); director.Add(assistantDirector); var mathTeacher = new SchoolMember("Petkova", "math teacher"); assistantDirector.Add(mathTeacher); mathTeacher.Add(new Person("Ivancho", "student")); mathTeacher.Add(new Person("Mariika", "student")); mathTeacher.Add(new Person("Cvetancho", "student")); mathTeacher.Add(new Person("Ilianka", "student")); var biologyTeacher = new SchoolMember("Stoqnov", "biology teacher"); assistantDirector.Add(biologyTeacher); biologyTeacher.Add(new Person("Misho ", "student")); biologyTeacher.Add(new Person("Vasko", "student")); biologyTeacher.Add(new Person("Polq", "student")); biologyTeacher.Add(new Person("Kalinka", "student")); biologyTeacher.Add(new Person("Maq", "student")); director.Display(); }