public byte[] zipTobyteArray(byte[] byteArray)
        {

            MemoryStream outputMemStream = new MemoryStream ();
            MemoryStream memStreamIn = new MemoryStream(byteArray);
            ZipOutputStream zipStream = new ZipOutputStream( outputMemStream);

            zipStream.SetLevel(5); //0-9, 9 being the highest level of compression

            ZipEntry newEntry = new ZipEntry("1");
            newEntry.DateTime = DateTime.Now;

            zipStream.PutNextEntry(newEntry);

            StreamUtils.Copy(memStreamIn, zipStream, new byte[4096]);
            zipStream.CloseEntry();

            zipStream.IsStreamOwner = false;	
            zipStream.Close();

            outputMemStream.Position = 0;
           
            byte[] byteArrayOut = outputMemStream.ToArray();
            return outputMemStream.ToArray();
        }

 public byte[] UnzipTobyteArray (byte[] inbyte)
       {
           MemoryStream inputMemStream = new MemoryStream(inbyte);
           ZipInputStream zipInputStream = new ZipInputStream(inputMemStream);
           ZipEntry zipEntry = zipInputStream.GetNextEntry();
           MemoryStream streamWriter = new MemoryStream();
           StreamUtils.Copy(zipInputStream, streamWriter, new byte[4096]);
           return streamWriter.ToArray();
        }