// GET: Courses
        public ActionResult Index()
        {
            var courseViewModel = Mapper.Map <IEnumerable <Course>, IEnumerable <CourseViewModel> >(_courseApp.GetAll());

            foreach (CourseViewModel item in courseViewModel)
            {
                item.CountStudents = _studentApp.CountStudentsByCourse(item.CourseId);
                item.CountTeachers = _teacherApp.CountTeachersByCourse(item.CourseId);
                item.CourseAverage = _courseSubjectsApp.AverageByCourse(item.CourseId);
            }

            return(View(courseViewModel));
        }