//classId public GradeBook Get(int id) { var gradeBook = new GradeBook(); var _gradeBookRepository = new GradeBookRepository(); var _teacherRepository = new TeacherRepository(); var _rosterRepository = new RosterRepository(); gradeBook.StudentsEnrolled = _rosterRepository.GetStudentsEnrolledIn(id); gradeBook.Course = _teacherRepository.GetCourseById(id); gradeBook.AssignmentList = _gradeBookRepository.GetListOfAssignmentsById(id); gradeBook.StudentPerformances = _gradeBookRepository.GetListOfStudentPerformanceById(gradeBook.StudentsEnrolled); return gradeBook; }