While working on getting a new project ready for publishing to the Internet. I discovered that when you are working with the built-in web server that comes with Visual Studio that it processes all requests through the ASP.NET isapi dll.  Which works great when you are working with url rewriting.

The issue comes about when you move to a production environment with IIS.  Most production environments do not do all their processing through the ASP.NET isapi dll.  Most shared hosting environments would not be accommodating of such a request either because it could cause interference with other running applications on the host server.  But for most people that host their own applications it can be quickly solved with the following.

IIS Management Console

First off we need to launch the IIS Management Console. Once the window is open we need to find the web site that we want to allow to have wild card mapping enabled on and go to the properties for the web site.

Once we have the properties open then we need to click on the Home Directory for the application. This will allow us to click on the Application Configuration button. In the window that opens the bottom half of the form allows us to define Wildcard application maps.  We need to click on the Insert button which will then allow us to enter the path to file that we want to process requests.  In this case the file is c:\windows\microsoft.net\framework\v2.0.50727\aspnet_isapi.dll.  We then have the option of checking that the file exists.  This should be turned off for the most part as most of the files that will be processed may not actually exist on the server itself but virtually.  Once we have this completed all of this. We can click all the OK button's and close out the IIS management console.