Dynamic Robots.txt with ASP.NET 2.0
I needed to do this recently and I couldn’t find any instructions on the web. There were bits and pieces here and there, but nothing all in one place - and you need to know what you are looking for.
So here it is - step by step explanation on how to create a dynamic robots.txt file (or any text file for that matter) with IIS 6.0 and ASP.NET 2.0

