get only the first line without download the whole file?

Is it possible to read only one line per ftp without first downloading the whole file with c#?
With fluentFtp I did that by opening a stream and reading a line and then sending an ABOR command.
But WinScp does not support streams. Does anyone have another idea?

You can handle Session.FileTransferProgress event and set FileTransferProgressEventArgs.Cancel to abort the transfer once you download sufficient data.
https://winscp.net/eng/docs/library_session_filetransferprogress
https://winscp.net/eng/docs/library_filetransferprogresseventargs

A request for streaming interface is tracked here:
https://winscp.net/tracker/1738