static void txudp(Byte[] txdata, Byte txtype, Byte filestat) { // add the txtype and filestatus at the beginning Byte[] darr = new byte[statics.PayloadLen + 2]; darr[0] = txtype; darr[1] = filestat; Array.Copy(txdata, 0, darr, 2, statics.PayloadLen); Udp.UdpSendData(darr); // Console.WriteLine("TX filestat: " + filestat+ " data:" + darr[2].ToString("X2") + " " + darr[3].ToString("X2")); }