public async Task <ActionResult> SpecificInstructor(int id)
        {
            IEnumerable <Instructor> result = null;

            using (_instructorRepository = new InstructorRepository())
            {
                var allInstructors = await _instructorRepository.GetListWithCoursesAsync();

                result = from x in allInstructors where x.InstructorID == id select x;
            }
            return(View(result.ToList()[0]));
        }