static public void TestMethod() { Discipline math = new Discipline("Math", 1, 1); Discipline programming = new Discipline("Programming", 2, 2); List <Discipline> disciplines = new List <Discipline>(); disciplines.Add(math); disciplines.Add(programming); Teacher teacher = new Teacher("Ivan", disciplines); Console.WriteLine(teacher); teacher.AddDiscipline(new Discipline()); Console.WriteLine(teacher); teacher.RemoveDiscipline(math); Console.WriteLine(teacher); teacher.Disciplines = new List <Discipline>(); Console.WriteLine(teacher); teacher.Live(); }