I\'m trying to redirect stdin and stdout of a console application, so that I can interact with them via F#. However, depending on the console application the obvious code se
I'll bet neither python nor fsi are actually generating a line of text to be read. The call to ReadLine will block until a full line ending with a carriage return or linefeed is available.
Try reading a character at a time (with Read instead of ReadLine) and see what happens.