Hi
Seems that there is no freeware way to convert URL to PDF. I have found some free opensources, like:
http://www.htmldoc.org
http://www.pdfsharp.net/
I have tried to implement simple convertor and realize that the main problem is to collect all images, css and JS from URL. Did you met the same problem?
The simplest but ugly way is to create .Net WebBrowser, navigate to specified URL and save it :) Also, u can try to use regex to extract images, css, scripts, etc.
Sorry, but I have not finished solution to answer your question...