public Music(Singer nameS, Author nameA, int time, string nameM, string link)
 {
     NameS1 = nameS;
     NameA  = nameA;
     Time   = time;
     NameM1 = nameM;
     Link   = link;
 }
        void InitMusic()
        {
            // Person a = new Person(); vi du ve truu tuong - khong the tao 1 thuc the qua truu tuong
            //Singer singer = new Singer();   - vi du ve phuong thuc nhap
            //singer.Name = "aa";

            //MessageBox.Show(singer.Name);

            people    = new Person[10];
            people[0] = new Singer("Lap Nguyen", new DateTime(123), true, 1000);
            people[1] = new Author();
            people[2] = new Singer("Min", new DateTime(456), true, 1000);
            people[3] = new Author();
            people[4] = new Singer("Lil Nas X_ Billy", new DateTime(789), true, 1000);
            people[5] = new Author();


            musics    = new Music[10];
            musics[0] = new Music((Singer)people[0], (Author)people[1], 123, "Em Bang Qua", "./Em Bang Qua - Lap Nguyen.wav");
            musics[1] = new Music((Singer)people[2], (Author)people[3], 123, "Tren Tinh Ban Duoi Tinh Yeu", "./Tren Tinh Ban Duoi Tinh Yeu - Min.wav");
            musics[2] = new Music((Singer)people[0], (Author)people[3], 123, "Old Town Road", "./Old Town Road Remix_ - Lil Nas X_ Billy.wav");

            //media = new Media(musics[0].getLink()); media.play();
        }