static void Main(string[] args) { Teachers teacher = new Teachers("Ivan Lorisov"); teacher.AddDiscipline(new Disciplines("Biology", 5, 5)); teacher.AddDiscipline(new Disciplines("Chemistry", 3, 6)); teacher.AddDiscipline(new Disciplines("Mathematics", 3, 8)); SchoolClasses classB = new SchoolClasses("ID123"); classB.AddStudent(new Students("Mitko Ivanov", 13)); classB.AddStudent(new Students("Pavel Penkov", 20)); classB.AddStudent(new Students("Ivaylo Tsvetkov", 25)); classB.ClassesInfo("ID123"); School school = new School(classB); school.AddClass(classB); }