Closing a fancybox from controller in asp.net mvc 5 (vb)

Iam calling form inside a fancybox. After filling the form it saves data and redirect to index page. But the page redirection is happening in within the fancybox. Is it possible to close the fancybox from controller and redirect to index page? here is a method I used but don't worked

Return RedirectToAction("Index",Nothing,New With{.href="/Home/Index",.target="_parent"})

via Chebli Mohamed