Compression Helper Class using SharpZipLib[9]

                throw new argumentnullexception("stringtodecompress", "you tried to use an empty string");

            }

            try

            {

                byte[] inarr = convert.frombase64string(stringtodecompress.trim());

                outstring = encoding.unicode.getstring(decompress(inarr));

            }

            catch (nullreferenceexception  nex)

            {

                return nex.message;

            }