Correct, in 2006 there were no LINQ, extension methods and a number of other great improvements which kind of makes the article less valuable.

Not that it was terribly valuable to begin with: as a programmer, using the language at hand to write code that 1) works and 2) is as clear as possible is exactly your job.

Emulating other languages because of feature envy is really stupid, the first C# snippet is a prime example of this. I would not want to work with someone who deliberately makes the code harder to read in order to mimic his/her own favorite language. Every language has its idioms, just learn them and quit bitching.

As a side note, the example chosen was particularly poor because, if the collection contains a huge number of items, concatenating them without a StringBuilder in .NET land is a terribile idea.