SerialDataReceivedEventArgs - How does it work?

[ionlylooklazy]

If I have an event handler defined as such;

Private Sub Data_Received(ByVal sender As System.Object, ByVal e As System.IO.Ports.SerialDataReceivedEventArgs) Handles sp.DataReceived

end sub

How does it handle multiple bytes?

Say I receive a packet of 10 bytes, Will this event trigger on each byte? or is there a buffer that must be filled for this to trigger? or can I read all incoming bytes while in the sub?

if i have the following code inside the sub...

 While ((sp.BytesToRead <> 0))

packet(i)

i += 1
end while

or would it depend on the time between the received bytes?