public void post_request(string Login,string Pass)
        {
            HttpWebRequest myHttpWebRequest = (HttpWebRequest)HttpWebRequest.Create("http://wg53.odnoklassniki.ru/cdk/st.cmd/login/tkn/718");
            myHttpWebRequest.Method = "POST";
            myHttpWebRequest.UserAgent = "Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US) AppleWebKit/530.5 (KHTML, like Gecko) Chrome/2.0.172.37 Safari/530.5";
            myHttpWebRequest.Accept = "application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5";
            myHttpWebRequest.Headers.Add("Accept-Language", "ru-RU,ru;q=0.8,en-US;q=0.6,en;q=0.4");
            String Send = "st.posted=set&st.email="+Login+"&st.password="+Pass+"+&button_go=%D0%92%D0%BE%D0%B9%D1%82%D0%B8";
            byte[] ByteArr = System.Text.Encoding.Default.GetBytes(Send);
            myHttpWebRequest.ContentLength = ByteArr.Length;
            myHttpWebRequest.GetRequestStream().Write(ByteArr, 0, ByteArr.Length);
           
            HttpWebResponse myHttpWebResponse = (HttpWebResponse)myHttpWebRequest.GetResponse();
            StreamReader myStreamReader = new StreamReader(myHttpWebResponse.GetResponseStream());
            
            MessageBox.Show(myStreamReader.ReadToEnd());
        }