Hi Marcus,
Script# has two types of projects that it can create:
- Projects that use the Script# library (sscorlib)
- Projects that use the Microsoft Ajax library (aacorlib)
The two project types are not compatible with each other. I'm not sure, but support for aacorlib may have been removed from the most recent version of Script#. There's nothing wrong with using either aacorlib or sscorlib - you just have to include the necessary *.js files (sscorlib.js or MicrosoftAjax.js) in your view. I don't know if they can be used on the same page, though.
For the scripts that come with ASP.NET MVC we chose to use "aacorlib" because we wanted to be compatible with the rest of Microsoft Ajax.
Thanks,
Eilon