How to set page as default page in web application c# and open that page while using URL Routing

I am creating new web application asp.net c# project. Now in there i am using url routing. The basic url would be while developement is localhost/VAEBS . Now i want that whenever www.VAEBS.com or localhost/VAEBS is opened in browser it must open my login page, like this localhost/VAEBS/LoginScreen . Yet it is openeing login screen on typing localhost/VAEBS , but it is not showing LoginScreen text in url , which needs to be like this localhost/VAEBS/LoginScreen