Hi Gerard,

I compiled all my SF application with .Net 4 runtimes, it is much better, faster and reliable than 2.0, also there are new functionality in version 4 that does not exist in the previous one, so you can go ahead and use 3.5 or better yet 4.

I had used Linq briefly in one of my applications and yes it is very nice and will get you the results you are looking for, so go ahead and use it without hesitation.

Edhy Rijo