I don't have the book, but couldn't it be that the author is referring to the date something was added to the .NET Framework?
Since .NET 2 builds on top of .NET 1.0 and 1.1, it's quite possible that some features in the .NET 2 framework are available since August 2003....
Imar
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Imar Spaanjaars
http://Imar.Spaanjaars.Com
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