// `connectionString` is the constructor's parameter name
cfg.For<IUnitOfWork>().Use<MyContext>().Ctor<string>("connectionString").Is(someValueAtRunTime);;
// or ...
ObjectFactory.Container.With("connectionString").EqualTo(someValueAtRunTime).GetInstance<IUnitOfWork>();

<script src="jquery.js"></script>
<script src="jquery-migrate-1.2.1.js"></script>

PM> update-package -reinstall

// در فایل CaptchaImageResult.cs
HttpResponseBase response = context.HttpContext.Response;
response.ContentType = "image/jpeg";
context.HttpContext.DisableBrowserCache(); // این سطر جدید است
bitmap.Save(response.OutputStream, ImageFormat.Jpeg);

    public class HomeController : Controller
    {
        [NoBrowserCache]
        public ActionResult Index()

<img src="@Url.Action("CaptchaImage", "Home", routeValues: new{ rdnDate = DateTime.Now.Ticks })"/>