help with an ASP.Net page to convert XML to HTML (using XSLT)

Question

Hi all I am new to this forum and I am undertaking a project that converts XML to HTML (via an already built XSLT) through an ASP.NET web page UI. Now I am saving the XML file (via file upload control) to a location on local disk and then I want to apply the transform to that file. The issue is that I cannot figure out how to do this! The file uploads fine (makes a copy) but I do not know where to go from here........Any advice would be greatly appreciated.