// very good sample https://github.com/jitendraselvam/ImageUpload/tree/master/ImageUploader
// put in the controller
        [HttpPost]
        public ActionResult Index(HttpPostedFileBase kep)
        {
            if(kep != null)
            {
                string content = Server.MapPath("/Content");
                kep.SaveAs(System.IO.Path.Combine(content, "kep.jpg"));
            }        

            return RedirectToAction("Index");
        }