public ActionResult EditCourse(int id)
        {
            AddEditCourseVM viewmodel = new AddEditCourseVM();

            viewmodel.currentCourse = CourseRepository.Get(id);
            return(View(viewmodel));
        }
        public ActionResult EditCourse(AddEditCourseVM viewModel)
        {
            if (!ModelState.IsValid)
            {
                return(View(viewModel));
            }

            CourseRepository.Edit(viewModel.currentCourse);
            return(RedirectToAction("Courses"));
        }