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While you are connected to an FTP server, the server keeps track of your working directory. The server assumes you are referring to this directory whenever you perform a file operation without specifying an absolute path. In fact many FTP servers do not support the use of absolute paths.

The current working directory is available in the ServerDirectory property:

string directory = ftpConnection.WorkingDirectory;;

This may be changed by simply setting the ServerDirectory property, or by using:

ftpConnection.ChangeWorkingDirectory(directory);;

Or to simply go up to the parent directory:

ftpConnection.ChangeWorkingDirectoryUp();;