public ActionResult Index(user objchk)
        {
            if (ModelState.IsValid)
            {
                using (ManagementEntities db = new ManagementEntities())
                {
                    var obj = db.users.Where(a => a.Username.Equals(objchk.Username) && a.Password.Equals(objchk.Password)).FirstOrDefault();

                    if (obj != null)
                    {
                        Session["UserID"]   = obj.Id.ToString();
                        Session["UserName"] = obj.Username.ToString();
                        return(RedirectToAction("Index", "Home"));
                    }
                    else
                    {
                        ModelState.AddModelError("", "The UserName or Password Incorrect");
                    }
                }
            }
            return(View(objchk));
        }