Been out of real C# for awhile - help me decipher this code

[Arjay]

Given that there's 43 views on this thread and no responses, I'd say this is not a particularly common way of doing this - but definitely looks like "Expert" code to me

LINQ is a common way of doing things. As far as the 43 views..., keep in mind that folks here are volunteers and with the various time zones around the world, not everyone may be awake when you first posted, so a response may take up to a day or two.