Libraries for accessing a SFTP server (FTP over SSH) using C# are not included in the framework ((not yet?)). Anyway, some snippets or libraries are available for free on the internet.
I will list two of them :
– SharpSSH
SharpSSH is quite a good library, standalone, that implement the jsch library.
– SFTP using WinSCP and C#
well … quite obvious… “SFTP using WinSCP and C#” is a method that use Winscp Process into c#code to execute sftp commands. A negative point is that WinSCP has to be installed on the computer that need to access the SFTP server.