public IActionResult Create(Issue issue) { if (ModelState.IsValid) { issue.CreatedAt = DateTime.Now; _iIssueManager.Add(issue); return(RedirectToAction(nameof(Index))); } ViewData["BookId"] = new SelectList(_iBookManager.GetAll(), "Id", "Name", issue.BookId); ViewData["MemberId"] = new SelectList(_iMemberManager.GetAll(), "Id", "Name", issue.MemberId); return(View(issue)); }