Introducing LINQ to XML
As a .NET developer, you are bound to encounter XML-based data in numerous places. Application and web-based configuration files store information as XML. Windows Presentation Foundation uses an XML-based grammar (XAML) to represent desktop GUIs. ADO.NET DataSets can easily save out (or load in) data as XML. Even Windows Communication Foundation stores numerous settings as the well-formatted string called XML.
Although XML is indeed everywhere, programming with XML has historically been tedious, verbose, and complex if you are not well versed in a great number of XML technologies (XPath, XQuery, XSLT, DOM, SAX, ...