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.