Get Performance Counter Instance Name (w3wp#XX) from ASP.NET worker process ID

I would like to display some memory statistics (working set, GCs etc.) on a web page using the .NET/Process performance counters. Unfortunately, if there are multiple application pools on that server, they are differentiated using an index (#1, #2 etc.) but I don’t know how to match a process ID (which I have) to that #xx index. Is there a programmatic way (from an ASP.NET web page)?

Mass 301 redirects in ASP.NET, including pages that need to redirect to a different place depending on the query string parameters

We have several pages of our site indexed using old non-SEO friendly URLS such as http://www.domain.com/DocumentDetails.aspx?id=555. Recently we implemented routing that uses slugs stored in the database and looks up the slug to forward you to the right page using routing, for example: http://www.domain.com/Documents/Title-of-the-Document