What is the minimum number of bytes that will cause Socket.Receive to return?

Question

We are using a application protocol which specifies the length indicator of the message in the first 4 bytes. Socket.Receive will return as much data as in the protocol stac

Answer 1

No, there isn't a minimum buffer size, the length in the receive just needs to match the actual space.

If you send a length in four bytes before the messages actual data, the recipient needs to handle the cases where 1, 2, 3 or 4 bytes are returned and keep repeating the read until all four bytes are received and then repeat the procedure to receive the actual data.