title: How to prevent user from direct url entering
body: <p>I am using ASP.NET 4.0 Framework.I have a directory which contains 10 PDF files i.e pdf1,pdf2....pdf10. On button click i am using Response.Redirect &amp; passing Pdf file path in order to open it in the browser. but, this enables user to view the path(url) of the PDF folder using this url he can open any other pdf directly. How can i stop him accessing PDF directly from the url</p>