public void Compress(string inputFile, string outputFile)
        {

            using (FileStream fileStream = File.Open(inputFile, FileMode.Open, FileAccess.Read))
            {
                using (var zipToCreate = new FileStream(outputFile, FileMode.Create, FileAccess.Write))
                {
                    using (ZipArchive archive = new ZipArchive(zipToCreate, ZipArchiveMode.Create, true))
                    {
                        ZipArchiveEntry fileEntry = archive.CreateEntry(Path.GetFileName(inputFile));
                        using (var entryStream = fileEntry.Open())
                        {
                            fileStream.CopyTo(entryStream);
                        }
                    }
                }
            }
        }