public bool InitializeFromRawData(byte[] pData, DateTime lastModified)
        {
            byte[] compressedFile = null;
            using (MemoryStream mstocompress = new MemoryStream(pData))
            {
                using (MemoryStream output = new MemoryStream())
                {
                    using (DeflateStream ds = new DeflateStream(output, CompressionMode.Compress))
                    {
                        mstocompress.CopyTo(ds);
                        ds.Flush();
                        compressedFile = new byte[output.Length];
                        output.Seek(0, SeekOrigin.Begin);
                        output.Read(compressedFile, 0, compressedFile.Length);
                    }
                }
            }
    }