Second form.
In my opinion, the less language constructs and keywords you have to use, the better. C# has enough extraneous crud in it as it is.
Generally the less you have to type, the better. Seriously, how could you not want to use "var" in situations like this? Surely if being explicit was your only goal, you'd still be using hungarian notation... you have an IDE that gives you type information whenever you hover over... or of course Ctrl+Q if you're using Resharper...
@T.E.D. The performance implications of a delegate invocation are a secondary concern. If you're doing this a thousand terms sure, run dot trace and see if it's not acceptable.
@Reed Copsey: re non-standard, if a developer can't work out what ".Each" is doing then you've got more problems, heh. Hacking the language to make it nicer is one of the great joys of programming.
