The InLine property controls how urgent (out-of-band)
data is handled when reading data from the socket. If set to a
value of true, urgent data is placed in the data stream along with
non-urgent data. To determine if the data that is being read is
urgent, the AtMark property can be read.
Urgent data is sent and received directly from the socket, and
is not buffered even if buffering is enabled. It is recommended
that you do not enable buffering if urgent data is being received
in-line.