while (true)
                {
                    byte[] buffer = SocketEx.Receive(socketClient, this.BefferSize);
                    if (buffer == null)
                        continue;
                    …………
                }

        public static byte[] Receive(Socket socket, int beffersize)
        {
            try
            {
                using (MemoryStream ms = new MemoryStream())
                {
                    socket.Receive(befferSize, 4, SocketFlags.None);
                    int dataLength = BitConverter.ToInt32(befferSize, 0);
                    //判断读取字节为0
                    if (dataLength == 0)
                        return null;
                    …………
                    …………
                    return ms.ToArray();
                }
            }
            catch (Exception ex)
            {
                throw ex;
            }
        }