creating a tcp header c# -


i communicating application requires custom tcp header, may me on how send one, have tried following failing

public string sendrequest(string destinationurl, string requestxml, int timeout) {     byte[] tcpheader = new utf8encoding().getbytes(createtcpheader(requestxml));     byte[] bytestosend = new utf8encoding().getbytes(requestxml);     tcpclient client = new tcpclient("127.0.0.1", 23001);     networkstream nwstream = client.getstream();      //console.writeline("sending : " + data);     nwstream.write(tcpheader, 0, tcpheader.length);     nwstream.write(bytestosend, 0, bytestosend.length);       byte[] bytestoread = new byte[client.receivebuffersize];     int bytesread = nwstream.read(bytestoread, 0, client.receivebuffersize);    // console.writeline("received : " + new utf8encoding().getstring(bytestoread, 0, bytesread));    // console.readline();     client.close();     return (new utf8encoding().getstring(bytestoread, 0, bytesread).tostring()); } static string createtcpheader(string data) {     //byte[] header;     int quotent = data.length / 256;     decimal remainder = data.length % 256;     byte[] bytequotient = new utf8encoding().getbytes(quotent.tostring());     byte[] byteremainder = new utf8encoding().getbytes(remainder.tostring());      //header = bytequotient.tostring() + byteremainder.tostring();     return bytequotient.tostring() + byteremainder.tostring(); }


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