Umbraco ContactController

ContactController.cs

using System;
using System.Web.Mvc;
using Umbraco.Web.Mvc;
using Wyzweb.Models;

namespace Wyzweb.Controllers
{
    public class ContactController : SurfaceController
    {
        // GET: Contact
        public ActionResult RenderContactForm()
        {
            return PartialView("_ContactForm");
        }

        //Submit form Action
        [HttpPost]
        [ValidateAntiForgeryToken]
        public ActionResult SubmitForm(Contact model)
        {
            if (ModelState.IsValid)
            {
                try
                {

                    var response = true; //DO SOME AJAX REQUEST HERE OR DATABASE QUERY
                    

                    if (response == true)
                    {
                        TempData.Clear();
                        TempData.Add("Response", "Success! Your message has been received.");
                        return CurrentUmbracoPage();
                    }
                    else
                    {
                        TempData.Clear();
                        TempData.Add("Response", "Error! Your form as not sent");
                        return CurrentUmbracoPage();
                    }
                }
                catch (Exception e)
                {

                    TempData.Clear();
                    TempData.Add("Response", e.Message);
                    return CurrentUmbracoPage();
                }

            }
            else
            {

                return CurrentUmbracoPage();
            }

        }
    }
}