HomeController.cs

using System.Globalization;
using System.Threading;
using System.Web.Mvc;

namespace I18nDemo.Controllers
{
    public class HomeController : Controller
    {
        public ActionResult Index()
        {
            Thread.CurrentThread.CurrentCulture = CultureInfo.GetCultureInfo("ar");
            Thread.CurrentThread.CurrentUICulture = CultureInfo.GetCultureInfo("ar");

            return View();
        }
    }
}