public ActionResult Enroll(LearningCenter.Models.ClassModel classModel) { if (ModelState.IsValid) { if (Session["User"] != null && Request.Form["Id"] != null) { // get current user var user = (LearningCenter.Models.UserModel)Session["User"]; // add class to user userManager.AddClass(user.Id, classModel.Id); } return(Redirect("~/Home/Enroll")); } return(View()); }