using System;

using System.Net;

using System.Xml;

using System.IO;

public class Program

{

        public static void Main(string[] args)

        {

            CallWebService();

            Console.ReadKey();

        }

​

        public static void CallWebService()

        {

            var _url = "http://themis-test/ocsinterface";

            var _action = "http://themis-test/ocsinterface?op=get_computers_V1";

​

            XmlDocument soapEnvelopeXml = CreateSoapEnvelope();

            HttpWebRequest webRequest = CreateWebRequest(_url, _action);

            InsertSoapEnvelopeIntoWebRequest(soapEnvelopeXml, webRequest);

​

            // begin async call to web request.

            IAsyncResult asyncResult = webRequest.BeginGetResponse(null, null);

​

            // suspend this thread until call is complete. You might want to

            // do something usefull here like update your UI.

            asyncResult.AsyncWaitHandle.WaitOne();

​

            // get the response from the completed web request.

            string soapResult;

            using (WebResponse webResponse = webRequest.EndGetResponse(asyncResult))

            {

                using (StreamReader rd = new StreamReader(webResponse.GetResponseStream()))

                {

                    soapResult = rd.ReadToEnd();

                }

                Console.Write(soapResult);

            }

        }

​

        private static HttpWebRequest CreateWebRequest(string url, string action)

        {

            HttpWebRequest webRequest = (HttpWebRequest)WebRequest.Create(url);

            //webRequest.Headers.Add("SOAPAction", action);

            webRequest.ContentType = "text/xml;charset=\"utf-8\"";

            webRequest.Accept = "text/xml";

            webRequest.Method = "POST";

            return webRequest;

        }

​

        private static XmlDocument CreateSoapEnvelope()

        {

            XmlDocument soapEnvelop = new XmlDocument();

            soapEnvelop.LoadXml(@"<?xml version='1.0' encoding='UTF-8'?>

            <soap:Envelope 

                xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance' 

                xmlns:soapenc='http://schemas.xmlsoap.org/soap/encoding/' 

                xmlns:xsd='http://www.w3.org/2001/XMLSchema' 

                soap:encodingStyle='http://schemas.xmlsoap.org/soap/encoding/' 

                xmlns:soap='http://schemas.xmlsoap.org/soap/envelope/'>

                <soap:Body>

                    <get_computers_V1>

                        <REQUEST>

                            <ENGINE>FIRST</ENGINE>

                            <ASKING_FOR>META</ASKING_FOR>

                            <CHECKSUM>131071</CHECKSUM>

                            <OFFSET>0</OFFSET>

                            <WANTED>131071</WANTED>

                        </REQUEST>

                    </get_computers_V1>

                </soap:Body>

            </soap:Envelope>

            ");

            return soapEnvelop;

        }

​

        private static void InsertSoapEnvelopeIntoWebRequest(XmlDocument soapEnvelopeXml, HttpWebRequest webRequest)

        {

            using (Stream stream = webRequest.GetRequestStream())            

                soapEnvelopeXml.Save(stream);

        }

}