// Sends data to a connected Socket. 
int bytesSend = senderSock.Send(msgAll);

// Receives data from a bound Socket. 
byte[] messageHeaderBytes = new byte[2];

// Get header bytes first
int bytesHeader = senderSock.Receive(messageHeaderBytes);
int messageLength = HexToInt(ByteArrayToHexString(messageHeaderBytes));

// Now recieve message itself
byte[] messageBytes = new byte[messageLength];
int bytesRecievedTotal = 0;
int bytesRec = 0;

while (bytesRecievedTotal < messageLength)
  {
    bytesRec = senderSock.Receive(messageBytes, bytesRec, messageLength, SocketFlags.None);
    bytesRecievedTotal = bytesRecievedTotal + bytesRec;
   }