Hello,

 While evaluating the latest version of the FTP libary for .NET I came accross the following behaviour that can be simulated by following the steps down below.  Please let me know if there's a fix available for this issue -

 Problem:  Very small files (1 - 2 charactes, or 4 bytes - for instance) are randomly downloaded empty, w/o errors being generated.  The higher the connection speed to the FTP server, the higher the occurence rate.  For an FTP server part of the LAN - we get about 15% of the files empty

 How to reproduce the behaviour: (1) use a source FTP server with a high connection speed [I used FileZilla on a LAN server because I wanted to test implicit SSL]; (2) Have available on the FTP server several very small files, say 4 bytes each - we'll attempt to download them in a single session [I used 100 text files, each having just 2 characters as the body of the file] (3) download all these files locally, one at a time, by name - as part of the same session. You'll end up with about 15% of the files which are empty (size=0), and no errors raised on either end (server, or client).

Here's the code that I used to simulate the behaviour.  Thanks for your help --

class TestConsole

static void Main(string[] args)

ftpSession.TraceWriter = Console.Out;

ftpSession.CertificateReceived += new CertificateReceivedEventHandler(ftpSession_CertificateReceived);

int hostport = 990;

ftpSession.Connect("your FTPS Server IP address", hostport, AuthenticationMethod.Tls, VerificationFlags.None, null);

ftpSession.SendCustomCommand("PROT P");

ftpSession.Login("your user name", "your password");

ftpSession.ChangeCurrentFolder("upload");

ftpSession.ListingParsers.Add(new FtpUnixListingParser());

FtpItemInfoList items = ftpSession.GetFolderContents();

foreach (FtpItemInfo item in items)

if (item.Type == FtpItemType.File)

string dnloadRemoteName = item.Name + ".dload";

string dnloadLocalName = "c:\\temp\\" + dnloadRemoteName;

AbstractFile localFile = new DiskFile(dnloadLocalName);

if (localFile.Size > 0)

localFile.Name = localFile.Name + ".txt";

ftpSession.CertificateReceived -= new CertificateReceivedEventHandler(ftpSession_CertificateReceived);

static void ftpSession_CertificateReceived(object sender, CertificateReceivedEventArgs e)

e.Action = VerificationAction.Accept;