Reads a single line of response from the server. Returns null reference (Nothing in Visual Basic) if the end of response has been reached without any preceding data.

Reads a single line of response from the server. Returns if either end of line was detected or the question prompt has been received (and no other data are pending) or the end of response has been reached. Returns null reference (Nothing in Visual Basic) if the end of response has been reached without any preceding data.