I have an ASP.Net 3.5 platform and windows 2003 server with all the updates.
There is a limit with .Net that it cannot handle more than 260 characters. Moreover if
If you're trying to get people to remember the URL, I wouldn't go more than 60. Use words if possible, because it's easier to remember "www.example.com/this-is-the-url" than "www.example.com/179264". If you're trying to get the page indexed, you could probably go more. The spiders look for words in the title too, and some people may be more likely to click on the link if the URL looks readable.