public static void Main()
        {
            List<Student> students = new List<Student>();
            students.Add(new Student("Chiflik", "Isterov", "5869898"));
            students.Add(new Student("Minka", "Petrova", "8789755"));
            students.Add(new Student("Sashka", "Ribarova", "1251125"));
            students.Add(new Student("Boiko", "Filipov", "54687563"));
            students.Add(new Student("Cvetan", "Gospodinov", "1234456"));
            students.Add(new Student("Dimitar", "Ganchev", "6668755"));
            students.Add(new Student("Alexander", "Dimitrov", "2222222"));
            students.Add(new Student("Dobrinka", "Ivankova", "552552"));
            students.Add(new Student("Geograf", "Vasilev", "52522"));
            students.Add(new Student("Penka", "Lopatkova", "3332212"));

            foreach (var student in students.OrderBy(student => student.FacultyNumber))
            {
                Console.WriteLine("{0}{1} - Faculty number: {2}", student.FirstName, student.SecondName, student.FacultyNumber);
            }
            Console.WriteLine();

            List<Worker> workers = new List<Worker>();
            workers.Add(new Worker("Chiflik", "Isterov", 500, 8));
            workers.Add(new Worker("Minka", "Petrova", 200, 4));
            workers.Add(new Worker("Marmar", "Vylov", 500, 6));
            workers.Add(new Worker("Petar", "Yanov", 550, 8));
            workers.Add(new Worker("Yonko", "Narov", 650, 7));
            workers.Add(new Worker("Milica", "Dimitrova", 250, 2));
            workers.Add(new Worker("Ognqn", "Serafimov", 850, 8));
            workers.Add(new Worker("Evelina", "Dimitrova", 1050, 10));
            workers.Add(new Worker("Kristina", "Kirilova", 1250, 16));
            workers.Add(new Worker("Korleone", "With Al Kapone", 300, 8));

            foreach (var worker in workers.OrderByDescending(worker => worker.MoneyPerHour()))
            {
                Console.WriteLine("{0} {1} - Money per hour: {2:f2}", worker.FirstName, worker.SecondName, worker.MoneyPerHour());
            }
            Console.WriteLine();

            List<Human> studentsAndWorkers = new List<Human>();
            studentsAndWorkers.AddRange(students);
            studentsAndWorkers.AddRange(workers);

            foreach (var studentOrWorker in studentsAndWorkers.OrderBy(h => h.FirstName).ThenBy(h => h.SecondName))
            {
                Console.WriteLine("{0} {1}", studentOrWorker.FirstName, studentOrWorker.SecondName);
            }
        }
        static void Main(string[] args)
        {
            List<Student> students = new List<Student>()
            {
                new Student("Angel","Angelov","12343"),
                new Student("Bojidar","Bratoev","432d213"),
                new Student("Cikoriq","Ciklamena","hd732j"),
                new Student("Dobra","Dudeva","9189819"),
                new Student("Elen","Elenov","72j21"),
                new Student("Fred","Flinstone","3fjjf2"),
                new Student("Gergana","Grudeva","8932929"),
                new Student("Haralambii","Hristov","r8w0q"),
                new Student("Iliq","Iliev","erdew"),
                new Student("Jecho","Jechev","73h371")
            };
            List<Worker> workers = new List<Worker>()
            {
                new Worker("Anton","Antonov",100,2),
            new Worker("Borko","Biserov",300,8),
            new Worker("Cveta","Cimilova",200,4),
            new Worker("Duda","DObreva",600,4),
            new Worker("Emiliq","Encheva",120, 2),
            new Worker("Fani","Filipova",130,8),
            new Worker("Grigorii","Georgoev",200,8),
            new Worker("Hristo","Hristov",246,8),
            new Worker("Ivan","Ivanov",250,8),
            new Worker("Jelqzko","Jelev",200,8)
            };
            Console.WriteLine("###Students###");

            students.OrderBy(st => st.StudentNumber).ToList().ForEach(st => Console.WriteLine("{0} -stud number-> {1}", st.FistName, st.StudentNumber));
            Console.WriteLine("###Workers###");

            workers.OrderByDescending(wr => wr.MoneyPerHour()).ToList().ForEach(wr => Console.WriteLine("{0} -money per hour->{1}", wr.FistName, wr.MoneyPerHour()));

            List<Human> humans = new List<Human>();
            humans.AddRange(workers);
            humans.AddRange(students);
            Console.WriteLine("###Humans###");
            humans
                .OrderBy(h => h.FistName)
                .ThenBy(h => h.LastName)
                .ToList()
                .ForEach(h => Console.WriteLine("{0} {1}", h.FistName, h.LastName));
        }