i am building a FTP adapter in .Net. currently i am using FtpWebRequest because it supports FTPS natively. however, i know that there are other types of FTP servers out there such as SFTP servers. i need to build an adapter that will run in at least the majority of the FTP servers, therefore i need to account for SFTP servers as well (i am assumming they are the two main security standards). does FtpWebRequest support SFTP servers? if not, are there classes in .Net that will allow me to FTP files to SFTP servers securely? thanks.