Deciding What ASP.NET Will Handle
As we mentioned earlier, enabling ASP.NET on the server will map some file extensions to be handled by ASP.NET. The most important and obvious of these are requests ending in .aspx, the default extension for an ASP.NET page. If you open up the application configuration dialog, you'll find a number of file extensions that IIS will send to aspnet_isapi.dll. After the hand-off is made, IIS doesn't care about what happens to the request. As we'll see in Chapter 8, some file extensions are handled by built-in classes that simply return a response indicating that the user isn't allowed to see the file (.cs and .vb code files, for example).Chapter 8.
