Will this code make sure I read all I want from a socket?

Question

Doing a Socket.Receive(byte[]) will get the bytes in from the buffer, but if the expected data is fairly large, all of the bytes might not yet be in the buffer, which would

Answer 1

No, Receive returns number of received bytes. You should properly handle this.

var needBytes = message_byte.Length;
var receivedBytes;
var totalReceivedBytes = 0;
do
{
    receivedBytes = sock.Receive(message_byte, totalReceivedBytes, needBytes, SocketFlags.None);
    needBytes -= receivedBytes;
    totalReceivedBytes += receivedBytes;
} while (needBytes > 0 && receivedBytes > 0)