What do you intend to do with it? If you want to show files on the
server there really isn't any control or anything built into ASP.Net to
do that; however if you want to allow your users to select a file on
their own machine and upload it to the server then you can use the
HtmlInputFile control. Here's a link to a page that describes both
uploading and downloading files, it should be able to help you with this.
