static void Main(string[] args)
{
Course course = new CSCourse();
course.AddSubject(new CourseSubject(301, "Programming"));
Course electronicsCourse = new ElectronicsCourse();
CourseSubject subject = new CourseSubject(401, "Basics of Electrical Science");
electronicsCourse.AddSubject(subject);
electronicsCourse.RemoveSubject(subject);
// Expected output.
// Calling CSCourse.AddSubject(CourseSubject)
// Calling Course.AddSubject(CourseSubject)
// Calling ElectronicsCourse.RemoveSubject(CourseSubject)
}
static void Main(string[] args)
{
Course course = new CSCourse();
course.AddSubject(new CourseSubject(301, "Programming"));
}