clear form after submit

[HttpPost]
        [ValidateAntiForgeryToken]
        public async Task<ActionResult> Contact(EmailFormModel model)
        {
            string message2 = "There are a few errors";
            if (ModelState.IsValid)
            { 
                message2 = "Thanks! We'll get back to you soon.";
                var body = "<p>Email From: {0} ({1})</p><p>Message:</p><p>{2}</p>";
                var message = new MailMessage();
                message.To.Add(new MailAddress("nengelen@online.nl")); //replace with valid value
                message.Subject = "Your email subject";
                message.Body = string.Format(body, model.FromName, model.FromEmail, model.Message);
                message.IsBodyHtml = true;
                using (var smtp = new SmtpClient())
                {
                    await smtp.SendMailAsync(message);
                    
                   
                }
               
            }
            if (Request.IsAjaxRequest())
            {
                return new JsonResult { Data = new { success = true, message = message2 } };
            }

            TempData["Message"] = message2;

            ModelState.Clear();
            return View(model);
        }