private static byte[] DecompressFileLZMA(byte[] compressedFile)
        {
            if (compressedFile == null)
            {
                return(compressedFile);
            }

            if (compressedFile.Length > 100000000) //100MB
            {
                return(null);
            }

            return(SevenZipHelper.Decompress(compressedFile));
        }
        private static byte[] CompressFileLZMA(byte[] fileToCompress)
        {
            if (fileToCompress == null)
            {
                return(fileToCompress);
            }

            if (fileToCompress.Length > 100000000) //100MB
            {
                return(null);
            }

            return(SevenZipHelper.Compress(fileToCompress));
        }