Create ZIP file from files uploaded in ASP.NET MVC

upload.cs

  [HttpPost]
        public ActionResult Upload(UploadModel model, IEnumerable<HttpPostedFileBase> files)
        {
            try
            {
                var guid = Guid.NewGuid();

                if (files != null && files.Any())
                {
                    using (var ms = new MemoryStream())
                    {
                        using (var zipArchive = new ZipArchive(ms, ZipArchiveMode.Create, true))
                        {
                            foreach (var attachment in files)
                            {
                                var entry = zipArchive.CreateEntry(attachment.FileName, CompressionLevel.Fastest);
                                using (var entryStream = entry.Open())
                                {
                                    attachment.InputStream.CopyTo(entryStream);
                                }
                            }
                        }

                        string folder = Server.MapPath("~/uploads/");
                        string fileName = string.Format("{0}.zip", guid);
                        string path = Path.Combine(folder, fileName);

                        using (FileStream file = new FileStream(path, FileMode.Create, System.IO.FileAccess.Write))
                        {
                            ms.Position = 0;
                            byte[] bytes = new byte[ms.Length];
                            ms.Read(bytes, 0, (int)ms.Length);
                            file.Write(bytes, 0, bytes.Length);
                            ms.Close();
                        }
                    }
                }
            }
            catch (Exception ex)
            {
            }
            return RedirectToAction("Index");
        }