public ActionResult Edit(FormCollection collection)
        {
            ViewBag.Admins = userManager.GetUsersFromRole("Admin").ToList();

            ViewBag.Platform = platformManager.GetPlatform(Convert.ToInt32(collection["id"]));
            try
            {
                Platform platform = platformManager.GetPlatform(Convert.ToInt32(collection["id"]));
                platform.Admins.Add(userManager.GetUser(Convert.ToString(collection["admin"])));
                platform.Name = Convert.ToString(collection["name"]);
                platformManager.ChangePlatform(platform);

                return(RedirectToAction("Index"));
            }
            catch
            {
                return(View());
            }
        }