C # - Ftp protocol implementation

Question

in the Compact Framework, the Ftp protocol is not implemented, so I developed it myself.

I have a question about passive mode and the commands that should have a data channel to read the response.

In my case, I am trying to restore (RETR) a file on my FTP server, so I:

The part that works well:

• Opencontrolchannel
• ReadControl (banner message)
• Senduser
• ReadControl (pending pass?)
• SENDPASS
• ReadControl (greeting message)
• Send passive
• ReadControl (Extract IP for DataChannel)

Parts that do not work very well (but work too, see explanation below)

• RETR myFile
• Opendatachannel
• ReadControl (Here I put the message "Begin Transfert" AND "Transfert complete", before reading any data!)
• ReadData li>
• CloseDataChannel
• CloseControlChannel

, , "Transfert complete", , ?

, ,

"150 ASCII a.she(0 ).\r\n"

:

"226 . \r\n"

Ftp, .NET Framework, :

FtpWebResponse ftpres = (FtpWebResponse)ftp.GetResponse();
// ftpres.StatusDescription = "150 Opening ASCII mode data connection for a.she (0 bytes).\r\n" 
string res = new StreamReader(ftpres.GetResponseStream()).ReadToEnd();
// ftpres.StatusDescription = "226 Transfer complete.\r\n"

, ... !

Answer 1

, , , , .

, , ( /), , , ...

(EDIT: , ( ), ...)