Socket: Send and receive zipped files

1. if (File.Exists(PFilename))
2.             {
3.                 FileStream fileStream = File.Open(PFilename, FileMode.Open, FileAccess.Read, FileShare.Read);
4.                 BinaryReader reader = new BinaryReader(fileStream);
   
                   long fileLength = fileStream.Length;
                   byte[] sendBytes = new byte[fileLength];
5.                 reader.Read(sendBytes, 0, sendBytes.Length);
   
6.                 state.m_currentSocket.Send(sendBytes, 0, sendBytes.Length, SocketFlags.None);
7.                 fileStream.Close();
8.                 reader.Close();
9.             }

Can you please point out how I may be able to use that in the above code?

Sorry for being useless.