using (MemoryStream ms = new MemoryStream())
                {
                    using (Package zip = Package.Open(ms, FileMode.Create))
                    {
                        Uri uri = PackUriHelper.CreatePartUri(new Uri(Path.GetFileName(_sFile), UriKind.Relative));
                        PackagePart part = zip.CreatePart(uri, "", CompressionOption.Normal);

                        using (FileStream fs = new FileStream(_sFile, FileMode.Open, FileAccess.Read))
                        {
                            using (Stream dest = part.GetStream())
                            {
                                fs.CopyTo(dest);
                            }
                        }

                        using (FileStream dstZip = new FileStream(sZipFileName, FileMode.Create))
                        {
                            ms.Position = 0;
                            ms.CopyTo(dstZip);
                        }
                    }

                    Console.WriteLine(_sFile);
                }