C# Invoice post in tally XML format connect to web to tally - Static IP Configuration

Asp.net C# application invoice post in tally in XML format - Web base application connect to tally ERP using static IP 

public string xmlPosting(string xml)
    {
       
        WebRequest request = WebRequest.Create("http://00.000.00.000:9000");​//Static IP

        request.Method = "POST";
        request.Timeout = 99000;
        byte[] byteArray = Encoding.UTF8.GetBytes(xml);
        request.ContentType = "application/x-www-form-urlencoded";
        request.ContentLength = byteArray.Length;
        Stream dataStream = request.GetRequestStream();
        dataStream.Write(byteArray, 0, byteArray.Length);
        dataStream.Close();
        WebResponse response = request.GetResponse();
        Response.Write(((HttpWebResponse)response).StatusDescription);
        dataStream = response.GetResponseStream();
        StreamReader reader = new StreamReader(dataStream);
        string responseFromServer = reader.ReadToEnd();
        //Response.Write(responseFromServer);
        // Clean up the streams.
        reader.Close();
        dataStream.Close();
        response.Close();
        StringBuilder output = new StringBuilder();
        return XmlError(responseFromServer);
    }