static void Main() { Teacher teacher1 = new Teacher("Vanya", "Karaasenova"); Teacher teacher2 = new Teacher("Maya", "Dobreva"); teacher1.AddDiscipline(new Discipline("Chemistry", 12, 10)); teacher1.AddDiscipline(new Discipline("Sport", 7, 5)); Console.WriteLine("Teachers details:"); Console.WriteLine(teacher1.ToString()); Console.WriteLine(teacher2.ToString()); Class testClass = new Class("12"); testClass.AddDiscipline(new Discipline("Chemistry", 12, 10)); teacher2.AssignGroup(testClass); foreach (Discipline discipline in testClass.Disciplines) { Console.WriteLine(discipline.ToString()); } }