We have an argument on the Wikipedia article on closure on whether C# 2.0 and ECMAScript closures are "fully featured" closures or not. The crux of the argument against them being true closures seems to be that they do not capture lexical bindings of return/break/continue statements from the outer scope in either of those languages. You can read the entire discussion here

I would appreciate any comments on the issue from people familiar with the subject - figured of all places, this would be the best one to look for any such ;) - either in this thread, or on the discussion page of the article.