protected void Application_BeginRequest(object sender,EventArgs e)
    {
        // If the product is not registered then
        // redirect the user to product registraion page.
        if (Application[ApplicationVarInfo.ProductNotRegistered] != null)
        {
             //HOW TO REDIRECT TO ACTION (action=register,controller=product)
         }
     }

或者有任何其他方法来验证每个url，同时在mvc中获取请求，并在需要时重定向到一个操作