pdoren / sharp-ftp-server

Asynchronous ftp server written in C#. Extensible to support any telnet type server (SMTP, POP3, etc.).

sharp-ftp-server

Asynchronous ftp server written in C#. Extensible to support any telnet type server (SMTP, POP3, etc.).

http://www.codeproject.com/Articles/380769/Creating-an-FTP-Server-in-Csharp-with-IPv-Support