public async Task <ActionResult> EditAssignmentAnswer(AssignmentAnswer model, int id)
        {
            if (ModelState.IsValid)
            {
                model.DateModified = DateTime.UtcNow.AddHours(1);
                await _assignmentService.EditAnswer(model);

                TempData["success"] = "Submitted Successful";
                return(RedirectToAction("Assignment"));
            }
            TempData["error"] = "Unable to Save";
            return(View(model));
        }