A simple FTP/FTPS/FTPES client. The client handles multiple connections and is thread safe. It also has high-level commands but supports direct command sending.

We are open to suggestions, don't hesitate to submit one.

As a NuGet package.

using (var ftpClient = new FtpClient(ftpUri, ftpCredentials))
{
    // ... Enjoy!
}

• IList<string> List(FtpPath path) lists a directory content and returns raw lines.
• IEnumerable<FtpEntry> ListEntries(FtpPath path) lists a directoy content and returns parsed entries.
• IEnumerable<string> Stat(FtpPath path) lists a directory content using the STAT command and returns raw lines.
• IEnumerable<FtpEntry> StatEntries(FtpPath path) lists a directory using the STAT command and returns parsed entries.
• Stream Retr(FtpPath path, FtpTransferMode mode = FtpTransferMode.Binary) opens a file for downloading
• Stream Stor(FtpPath path) creates a file for uploading
• bool Rmd(FtpPath path) removes the directory
• bool Dele(FtpPath path) removes the file
• bool Delete(FtpPath path) removes the entry, whenever it is a file or directory
• void RnfrTo(FtpPath from, FtpPath to) renames/moves a file/directory
• FtpEntry GetEntry(FtpPath path) gets informations about a file or directory

Note that all commands use an FtpPath instance, which has an automatic implicit constructor from string, so you can just use strings as parameters, the implicit conversion will do the trick.

For the hard-core developpers, here are some useful low-level commands. First of all, it is necessary to understand that the FtpClient instance can handle multiple sessions at the same time (thus, it uses one separate session to send one command). Usually it uses only one session, and reuses it command after command. You don't manipulate sessions directly but they are used by the client).

• bool HasFeature(string feature) indicates if a feature is supported by the server
• FtpSessionHandle Session() uses or create a session (this allows mutiple sessions at same time with only one FtpClient)
• FtpReply SendCommand(FtpSessionHandle session, string command, params string[] parameters) sends a command and returns a raw FTP reply
• FtpReply Expect(FtpReply reply, params int[] codes) expects the given reply to have one of the given codes.

For example:

// main connection to target
using (var ftpClient = new FtpClient(new Uri("ftp://server"), new NetworkCredential("anonymous","me@me.com")))
{
    // using or creating a session
    using(var ftpSession = ftpClient.Session())
    {
        // sending a custom command
        var ftpReply = ftpClient.SendCommand(ftpSession, "STUFF", "here", "now");
        // checkin the result. The Expect method returns the FtpReply, so SendCommand() and Expect() can be nested.
        ftpClient.Expect(ftpReply, 200, 250);
    }
}