End Google Ads 201810 - BS.net 01 --> hi all,
for compress the pdf file i use below code:

byte[] bufferWrite;

FileStream fsSource;

FileStream fsDest;
GZipStream gzCompressed;
fsSource = new FileStream(@"C:\Invoice.pdf", FileMode.Open, FileAccess.Read, FileShare.Read);

bufferWrite = new byte[fsSource.Length];

fsSource.Read(bufferWrite, 0, bufferWrite.Length);

fsDest = new FileStream(@"C:\Invoice.zip", FileMode.OpenOrCreate, FileAccess.Write);

gzCompressed = new GZipStream(fsDest, CompressionMode.Compress, true);

gzCompressed.Write(bufferWrite, 0, bufferWrite.Length);

fsSource.Close();
gzCompressed.Close();
fsDest.Close();

pdf file compress successfully but without extension(.pdf) .......where is problem?