多语种网站MVC 5

Question

我想创建一个多语言网站，我希望该网站的网址如下：en.exemple.com 和fr.exemple.com

 protected override IAsyncResult BeginExecuteCore(AsyncCallback callback, object state)
   {
            string cultureName = null;
            Attempt to read the culture cookie from Request
            HttpCookie cultureCookie = Request.Cookies["_culture"];
            if (cultureCookie != null)
                cultureName = cultureCookie.Value;
            else
                cultureName = Request.UserLanguages != null && Request.UserLanguages.Length > 0 ? Request.UserLanguages[0] : null; // obtain it from HTTP header AcceptLanguages

            // Validate culture name
            cultureName = CultureHelper.GetImplementedCulture(cultureName); // This is safe