private void Runbutton_Click(object sender, EventArgs e)
        {
            string docPath =
                Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments);

            #region useEngine
            ChromeOptions options = new ChromeOptions();
            options.AddArguments("--disable-extensions");    // to disable extension
            options.AddArguments("--disable-notifications"); // to disable notification
            ChromeDriver driver = new ChromeDriver(options);
            driver.Navigate().GoToUrl("https://facebook.com");
            #endregion
            try
            {
                LoginFB(driver);
                Thread.Sleep(5000);
            }

            catch (Exception ex) { MessageBox.Show("Lỗi đăng nhập facebook vui lòng kiểm tra lại hoặc liên hệ với nhân viên kỹ thuật.Chi tiết:" + ex.Message); }
            List <GoodUser> listResult = new List <GoodUser>();
            foreach (var link in ListGroup.Text.Split('\n'))
            {
                driver.Navigate().GoToUrl(link);
                for (int i0 = 0; i0 < int.Parse(NumberPost.Text) / 4; i0++)
                {
                    IJavaScriptExecutor js = (IJavaScriptExecutor)driver;
                    var newScrollHeight    = (long)js.ExecuteScript("window.scrollTo(0, document.body.scrollHeight); return document.body.scrollHeight;");
                    Thread.Sleep(10000);
                }
                Thread.Sleep(120000);
                var k = driver.FindElements(By.XPath("//div[@class='oajrlxb2 g5ia77u1 qu0x051f esr5mh6w e9989ue4 r7d6kgcz rq0escxv nhd2j8a9 nc684nl6 p7hjln8o kvgmc6g5 cxmmr5t8 oygrvhab hcukyx3x jb3vyjys rz4wbd8a qt6c0cv9 a8nywdso i1ao9s8h esuyzwwr f1sip0of lzcic4wl oo9gr5id gpro0wi8 lrazzd5p' and @role='button']"));
                foreach (var item in k)
                {
                    try
                    {
                        item.Click();
                        Thread.Sleep(10000);
                    }
                    catch (Exception) { }
                }
                HtmlDocument doc = new HtmlDocument();
                doc.LoadHtml(driver.PageSource);
                Thread.Sleep(5000);

                var Groupfeed = (from m in doc.DocumentNode.SelectNodes("//div[@class]").Cast <HtmlNode>()
                                 where m.Attributes["class"].Value == "du4w35lb k4urcfbm l9j0dhe7 sjgh65i0"
                                 select m).ToList <HtmlNode>();
                foreach (HtmlNode FeedItem in Groupfeed)
                {
                    List <string> keyOK = new List <string>();
                    List <string> email = new List <string>();
                    foreach (var item in Keybox.Text.Split('\n'))
                    {
                        if (FeedItem.InnerText.ToLower().Contains(item.ToLower()))
                        {
                            keyOK.Add(item);
                        }
                    }
                    if (keyOK.Count > 0)
                    {
                        Regex emailRegex = new Regex(@"\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*",
                                                     RegexOptions.IgnoreCase);
                        //find items that matches with our pattern
                        MatchCollection emailMatches = emailRegex.Matches(FeedItem.InnerHtml);

                        StringBuilder sb = new StringBuilder();

                        foreach (Match emailMatch in emailMatches)
                        {
                            email.Add(emailMatch.Value);
                        }
                        if (email.Count > 0)
                        {
                            try
                            {
                                MailMessage mail       = new MailMessage();
                                SmtpClient  SmtpServer = new SmtpClient("smtp.gmail.com");
                                mail.From = new MailAddress(Usermail.Text);
                                mail.To.Add(email.FirstOrDefault());
                                mail.Subject    = "JD Asia || Portfolio & Hồ sơ năng lực";
                                mail.IsBodyHtml = true;
                                string bODY = textBox1.Text;
                                foreach (var item in keyOK)
                                {
                                    bODY += System.IO.File.ReadAllText(Environment.CurrentDirectory + "\\" + item + "\\" + item + ".txt");
                                }
                                bODY     += textBox2.Text;
                                mail.Body = bODY;
                                foreach (var item in keyOK)
                                {
                                    var a = Directory.GetFiles(Environment.CurrentDirectory + "\\" + item + "\\Attach");
                                    foreach (var item2 in a)
                                    {
                                        Attachment attachment = new Attachment(item2);
                                        mail.Attachments.Add(attachment);
                                    }
                                }
                                SmtpServer.DeliveryMethod        = SmtpDeliveryMethod.Network;;
                                SmtpServer.Port                  = 587;
                                SmtpServer.UseDefaultCredentials = false;
                                SmtpServer.Credentials           = new System.Net.NetworkCredential(Usermail.Text, PassMail.Text);
                                SmtpServer.EnableSsl             = true;
                                SmtpServer.Send(mail);
                                Thread.Sleep(20000);
                                driver.Navigate().GoToUrl(FeedItem.SelectNodes(".//a[@class='oajrlxb2 g5ia77u1 qu0x051f esr5mh6w e9989ue4 r7d6kgcz rq0escxv nhd2j8a9 nc684nl6 p7hjln8o kvgmc6g5 cxmmr5t8 oygrvhab hcukyx3x jb3vyjys rz4wbd8a qt6c0cv9 a8nywdso i1ao9s8h esuyzwwr f1sip0of lzcic4wl oo9gr5id gpro0wi8 lrazzd5p']").FirstOrDefault().Attributes["href"].Value.Split('/')[4]);
                                Thread.Sleep(5000);
                                IWebElement textbox = driver.FindElement(By.CssSelector("div[class='notranslate _5rpu'][role='textbox']"));
                                textbox.SendKeys("Chào " + FeedItem.SelectNodes(".//a[@class='oajrlxb2 g5ia77u1 qu0x051f esr5mh6w e9989ue4 r7d6kgcz rq0escxv nhd2j8a9 nc684nl6 p7hjln8o kvgmc6g5 cxmmr5t8 oygrvhab hcukyx3x jb3vyjys rz4wbd8a qt6c0cv9 a8nywdso i1ao9s8h esuyzwwr f1sip0of lzcic4wl oo9gr5id gpro0wi8 lrazzd5p']").FirstOrDefault().InnerText + ", mình là Quang, BD của JD Asia. Mình thấy bạn có nhu cầu về ");
                                foreach (var item in keyOK)
                                {
                                    textbox.SendKeys(item.ToString() + ", ");
                                }
                                textbox.SendKeys("nên mình liên hệ ạ.");
                                textbox.SendKeys(OpenQA.Selenium.Keys.Shift + OpenQA.Selenium.Keys.Enter); textbox.SendKeys("Mình đã gửi các thông tin bạn cần qua email [Mail khách hàng], bạn nhớ check mail và phản hồi giúp mình nhé.");

                                textbox.SendKeys(OpenQA.Selenium.Keys.Shift + OpenQA.Selenium.Keys.Enter);
                                textbox.SendKeys("Bạn có thể xem qua portfolio của mình tại website: jdasia.vn");
                                textbox.SendKeys(OpenQA.Selenium.Keys.Shift + OpenQA.Selenium.Keys.Enter);
                                textbox.SendKeys("Cảm ơn " + FeedItem.SelectNodes(".//a[@class='oajrlxb2 g5ia77u1 qu0x051f esr5mh6w e9989ue4 r7d6kgcz rq0escxv nhd2j8a9 nc684nl6 p7hjln8o kvgmc6g5 cxmmr5t8 oygrvhab hcukyx3x jb3vyjys rz4wbd8a qt6c0cv9 a8nywdso i1ao9s8h esuyzwwr f1sip0of lzcic4wl oo9gr5id gpro0wi8 lrazzd5p']").FirstOrDefault().InnerText + ", mình rất mong có cơ hội được hợp tác cùng bạn.");
                            }
                            catch (Exception ex)
                            {
                                MessageBox.Show(ex.ToString());
                            }
                        }
                        else
                        {
                            try
                            {
                                driver.Navigate().GoToUrl("https://www.facebook.com/messages/t/" + FeedItem.SelectNodes(".//a[@class='oajrlxb2 g5ia77u1 qu0x051f esr5mh6w e9989ue4 r7d6kgcz rq0escxv nhd2j8a9 nc684nl6 p7hjln8o kvgmc6g5 cxmmr5t8 oygrvhab hcukyx3x jb3vyjys rz4wbd8a qt6c0cv9 a8nywdso i1ao9s8h esuyzwwr f1sip0of lzcic4wl oo9gr5id gpro0wi8 lrazzd5p']").FirstOrDefault().Attributes["href"].Value.Split('/')[4]);
                                Thread.Sleep(5000);
                                IWebElement textbox = driver.FindElement(By.CssSelector("div[class='notranslate _5rpu'][role='textbox']"));
                                textbox.SendKeys("Chào " + FeedItem.SelectNodes(".//a[@class='oajrlxb2 g5ia77u1 qu0x051f esr5mh6w e9989ue4 r7d6kgcz rq0escxv nhd2j8a9 nc684nl6 p7hjln8o kvgmc6g5 cxmmr5t8 oygrvhab hcukyx3x jb3vyjys rz4wbd8a qt6c0cv9 a8nywdso i1ao9s8h esuyzwwr f1sip0of lzcic4wl oo9gr5id gpro0wi8 lrazzd5p']").FirstOrDefault().InnerText + ", mình là Quang, BD của JD Asia. Mình thấy bạn có nhu cầu về ");
                                foreach (var item in keyOK)
                                {
                                    textbox.SendKeys(item.ToString() + ", ");
                                }
                                textbox.SendKeys("nên mình liên hệ ạ.");
                                textbox.SendKeys(OpenQA.Selenium.Keys.Shift + OpenQA.Selenium.Keys.Enter);
                                textbox.SendKeys("Bạn có thể xem qua portfolio của mình tại website: jdasia.vn");
                                textbox.SendKeys(OpenQA.Selenium.Keys.Shift + OpenQA.Selenium.Keys.Enter);
                                textbox.SendKeys("Nếu thấy phù hợp, bạn vui lòng cho mình xin email để mình gửi Hồ sơ năng lực và brief form nhé.");
                                textbox.SendKeys(OpenQA.Selenium.Keys.Enter);
                            }
                            catch (Exception) { }
                        }
                        try
                        {
                            Console.WriteLine(FeedItem.SelectNodes(".//a[@class='oajrlxb2 g5ia77u1 qu0x051f esr5mh6w e9989ue4 r7d6kgcz rq0escxv nhd2j8a9 nc684nl6 p7hjln8o kvgmc6g5 cxmmr5t8 oygrvhab hcukyx3x jb3vyjys rz4wbd8a qt6c0cv9 a8nywdso i1ao9s8h esuyzwwr f1sip0of lzcic4wl oo9gr5id gpro0wi8 lrazzd5p']").FirstOrDefault().Attributes["href"].Value + "ok");
                        }
                        catch (Exception) { }
                    }
                }
            }
            driver.Close();
            driver.Quit();
        }