I have released the next version of the free Ajax.NET Library . You can download the latest version 188.8.131.52 at http://ajax.schwarz-interactive.de/ .
The new features are:
The StackOverflowException I got from several developers was the missing support of System.Guid. This should now work, sorry!
There are new examples available at http://ajax.schwarz-interactive.de/  for HtmlControls, Caching and the Namespace Mapping. You have to scroll to the bottom of the page!
Updated: some other small bugfixes for a new version number: version 184.108.40.206 - fixed this.url in class.ashx if server is in root folder - fixed byte, StackOverflowException - changed interface IAjaxObjectConverter, added property ClientScriptIdentifier to remove multiple client scripts