trying to write code for upload but showing error

c:\Users\User\AppData\Local\Temp\Temporary ASP.NET Files\root\4d627a43\ab2fd5d9\App_Web_index.cshtml.32644dcb.zykik1o6.0.cs(36): error CS1001: Identifier expected

[HttpGet]
        public ActionResult Index()
        {
            return View();
        }

        [HttpPost]
        public ActionResult Up(HttpPostedFileBase file)
        {
            if (ModelState.IsValid)
            {
                if (file == null)
                {
                    ModelState.AddModelError("File", "Please Upload Your file");
                }
                else if (file.ContentLength > 0)
                {
                    int MaxContentLength = 1024 * 1024 * 3; //3 MB
                    string[] AllowedFileExtensions = new string[] { ".jpg", ".gif", ".png", ".pdf" };

                    if (!AllowedFileExtensions.Contains(file.FileName.Substring(file.FileName.LastIndexOf('.'))))
                    {
                        ModelState.AddModelError("File", "Please file of type: " + string.Join(", ", AllowedFileExtensions));
                    }

                    else if (file.ContentLength > MaxContentLength)
                    {
                        ModelState.AddModelError("File", "Your file is too large, maximum allowed size is: " + MaxContentLength + " MB");
                    }
                    else
                    {
                        var fileName = Path.GetFileName(file.FileName);
                        var path = Path.Combine(Server.MapPath("~/Upload"), fileName);
                        file.SaveAs(path);
                        ModelState.Clear();
                        ViewBag.Message = "File uploaded successfully. File path : ~/Upload/" + fileName;
                    }
                }
            }
            return View();
        }

    }
}