Checkout Controller in Tutoronic

public ActionResult index(int id)
        {
            if (Session["std"] != null)
            {
                var c = db.Courses.Find(id);
                var s = (Student)Session["std"];
                //if (db.Orders.Where(x => x.Student_fid == s.Student_id && x.OrderDetails.FirstOrDefault().course_fid == c.Course_id).Any())

                //{

                //    return RedirectToAction("blogdetails", "Home", new { id = c.Course_id });
                //}
                //else
                //{
                    Session["checkoutcourseid"] = id;
                    return View();
                //}
            }
            else
            {
                //TempData["errormsg"] = " <script> alert(' Please Loging/Signup first. ') </script>";
                return RedirectToAction("register", "Home");
            }

        }