Will writing a 4 byte array to a TCpClient networkstream fragment?

Simple question. Just hope I can ask it clearly.

As in the title, if I write a 4 byte array to a tcpclient network stream, could it be fragmented or because of TCP's packet size it will always arrive in one go?

I hope I asked that right.

It is possible (unlikely, perhaps) that it will get fragmented. There's a well known law that states if you don't take the possibility into account, it will happen when you least want / expect it. :)

Much appreciated.... I will handle the unlikely.

i don't know alot about that ,but form other tutorials i read , i found that :
if you send data like that

123456

then send
789

it may arrive in any of this ways :

123456789 (2 data are joined)
------------------------------
12
3456
789
(First data splitted to 2 data and second reach at once)
-------------------------------------------------------
1234567
89
(Part of second data is joined with first one and the reset reach in another packet )

so you need to handle this :)

i don't know if this right or not but it seem to as it happen in my application :(