using System;
using System.Threading.Tasks;
using System.Net;
using System.IO;
using System.Text;

namespace MyNamespace {
    public class MyActivity {

        private async Task<bool> Request () {

            string url = "http://noigan.it/wp-admin/admin-ajax.php";

            HttpWebRequest request = (HttpWebRequest)WebRequest.Create (new Uri(url));
            request.ContentType = "application/x-www-form-urlencoded; charset=utf-8";
            request.Headers.Add("Cookie", "wordpress_27e6e5f71b0ae47d93d1b1eace534cb8=mirko.diciaccio%40mobilesoft.it%7C1484125300%7CkcjNDhhORFpwtI3hMVxnXYDtBPTPcFBIgebbZvvAiBb%7Cbf9d46ad01f08c5459c99f16397872d54cb97b5b6295bf59d3b9c452289c05e0; PHPSESSID=arhns73eqttfoi2o4q0mhfl585; wordpress_logged_in_27e6e5f71b0ae47d93d1b1eace534cb8=mirko.diciaccio%40mobilesoft.it%7C1484125300%7CkcjNDhhORFpwtI3hMVxnXYDtBPTPcFBIgebbZvvAiBb%7C2c0f3473fdf8693675d2ce1b9d78ce1625525630230771489ed55c4513ce79c6");

            request.Method = "POST";

            string postData = "action=na_login&username=mirko.diciaccio%40mobilesoft.it&password=test_password";
            ASCIIEncoding encoding = new ASCIIEncoding ();
            byte[] byte1 = encoding.GetBytes (postData);
            request.ContentLength = byte1.Length;
            Stream newStream = request.GetRequestStream ();
            newStream.Write (byte1, 0, byte1.Length);
            newStream.Close ();

            using (WebResponse response = await request.GetResponseAsync ()) {
                using (Stream stream = response.GetResponseStream ()) {
                    return true;
                    //process the response
                }
            }
        }
    }
}