tokenExchange, C# - rextester

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//Rextester.Program.Main is the entry point for your code. Don't change it.
//Compiler version 4.0.30319.17929 for Microsoft (R) .NET Framework 4.5

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;
using System.Runtime.Serialization;
using System.Threading.Tasks;
using System.Net;
using Newtonsoft.Json.Linq;
using System.Diagnostics;
using System.Xml.Linq;
using System.Text;
using System.IO;
using System.Net.Http;

namespace Rextester
{
    public class Program
    {
        
        private static readonly HttpClient client = new HttpClient();
        
        public static void Main(string[] args)
        {
            //Your code goes here
            
            
            //DownloadData();

//var data = wc.DownloadString("https://jsonplaceholder.typicode.com/posts/1"); 
            //Console.WriteLine(data);
            
            //XDocument doc = new XDocument();
            //doc.Declaration = new XDeclaration("1.0", "utf-8", null);
            
            
            XNamespace xNamespace = "http://schemas.nav.gov.hu/OSA/1.0/api"; 
            
            
            XElement root = 
                new XElement(xNamespace+ "TokenExchangeRequest",
                    new XElement(xNamespace + "header",
                        new XElement(xNamespace + "requestId", "RIDDn0Vt4Nh8Fb6"),
                        new XElement(xNamespace + "timestamp", "2018-05-04T09:51:13.268Z"),
                        new XElement(xNamespace + "requestVersion", "1.0"),
                        new XElement(xNamespace + "headerVersion", "1.0")
                        ),
                    new XElement(xNamespace + "user",
                        new XElement(xNamespace + "login", "11"),
                        new XElement(xNamespace + "passwordHash", "CF83E1357EEFB8BDF1542850D66D8007D620E4050B5715DC83F4A921D36CE9CE47D0D13C5D85F2B0FF8318D2877EEC2F63B931BD47417A81A538327AF927DA3E"),
                        new XElement(xNamespace + "taxNumber", ""),
                        new XElement(xNamespace + "requestSignature", "091DF3928D97031A686E91005493E301FD1010F3E5C2E671173FDCE9A1BAA256C785BB7F0FB85E030B26225963A401779B2F1BD937CFA48281500102B4DD6027")
                        ),
                    new XElement(xNamespace + "software",
                        new XElement(xNamespace + "softwareId", ""),
                        new XElement(xNamespace + "softwareName", "NAV Online Invoice Tester"),
                        new XElement(xNamespace + "softwareOperation", "LOCAL_SOFTWARE"),
                        new XElement(xNamespace + "softwareMainVersion", "1.0"),
                        new XElement(xNamespace + "softwareDevName", "1.0"),
                        new XElement(xNamespace + "softwareDevContact", "1.0"),
                        new XElement(xNamespace + "softwareDevCountryCode", "HU"),
                        new XElement(xNamespace + "softwareDevTaxNumber", "")     
                        )
                             
                             
                             
                             
                             
                );

// Console.WriteLine(root.ToString());

try
        {
           var request = (HttpWebRequest)WebRequest.Create("https://api-test.onlineszamla.nav.gov.hu/invoiceService/tokenExchange");

var data = Encoding.ASCII.GetBytes(root.ToString());

request.Method = "POST";
            request.ContentType = "application/xml";
            request.ContentLength = data.Length;

using (var stream = request.GetRequestStream())
            {
                stream.Write(data, 0, data.Length);
            }

var response = (HttpWebResponse)request.GetResponse();

var responseString = new StreamReader(response.GetResponseStream()).ReadToEnd(); 
        }
        catch (WebException ex)
        {
            var responseString = new StreamReader(ex.Response.GetResponseStream()).ReadToEnd(); 
            Console.WriteLine(responseString);
        }
            
            
            
            
            
            //var wc=new WebClient();
            //var data = wc.DownloadString("https://api-test.onlineszamla.nav.gov.hu/invoiceService/tokenExchange");
        
        }

}
}

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Compilation time: 0,16 sec, absolute running time: 0,98 sec, cpu time: 0,81 sec, average memory usage: 28 Mb, average nr of threads: 9