public ActionResult Delete(int id)
        {
            Group group = _context.Groups.Find(id);

            _context.Groups.Remove(group);
            _context.SaveChanges();
            return(RedirectToAction("GetAllGroups"));
        }
        public ActionResult Edit(GroupViewModel model)
        {
            Group group = _context.Groups.Find(model.Id);

            group.Name            = model.Name;
            group.Year            = model.Year;
            group.CountOfStudents = model.CountOfStudents;

            _context.SaveChanges();
            return(RedirectToAction("GetAllGroups"));
        }
        public ActionResult CreateGroup(CreateGroupViewModel model)
        {
            Group group = new Group()
            {
                Name            = model.Name,
                CountOfStudents = model.CountOfStudents,
                Year            = model.Year
            };

            _context.Groups.Add(group);
            _context.SaveChanges();
            return(RedirectToAction("DashBoard", "AdminPanel"));
        }