Invokes the given site command on the server.
The reply returned by the server.
Site-specific commands are special commands that may be defined by a server. Such commands are defined on a server-by-server basis.
For example, a specific FTP server might define a PROCESS
site-command which results in another piece of software on the server being directed to perform some sort of processing on a particular file. The command required might be:
SITE PROCESS file-path
In this case, the site-command would be invoked as follows:
ftpConnection.InvokeSiteCommand("PROCESS", filePath);