C# 3.0 LINQ - querying data

[This was originally posted at http://timstall.dotnetdevelopersjournal.com/c_30_linq__querying_data.htm]

This looks so cool:

[Quote from MSDN]

The LINQ Project is a codename for a set of extensions to the .NET Framework that encompass language-integrated query, set, and transform operations. It extends C# and Visual Basic with native language syntax for queries and provides class libraries to take advantage of these capabilities. 

[End Quote]

It looks like you'd have the similar query abilities that you'd have in SQL or XPath, and it beats writing tons of custom code. See 101 examples here: http://www.msdn.microsoft.com/vcsharp/future/linqsamples/