public virtual async Task <ActionResult> Create(AddGroupCourseViewModel viewModel)
        {
            var adv = new GroupCourses
            {
                Course = _CourseService.GetById(viewModel.Course_Id)
            };

            _GroupCourseService.Insert(adv);
            await _unitOfWork.SaveChangesAsync();

            CacheManager.InvalidateChildActionsCache();
            return(RedirectToAction("Index", "GroupCourse"));

            PopulateCourcesDropDownList(null);
            return(View(viewModel));
        }
 public void Insert(GroupCourses article)
 {
     _GroupCources.Add(article);
 }