// GET: InstructorController
        public ActionResult Index()
        {
            var instructors = _instructorService.GetInstructorCourses();

            IntructorViewModel intructorViewModel = new IntructorViewModel();

            intructorViewModel.InstructorCourses = (List <InstructorCourse>)instructors.Data;

            var courses = (List <CourseResultModel>)_courseService.GetCourses().Data;

            ViewBag.Courses = new SelectList(courses, "CourseId", "Title");


            return(View(intructorViewModel));
        }