LINQ in Action is a fast-paced, comprehensive tutorial for professional developers who want to use LINQ. This book explores what can be done with LINQ, shows you how it works in an application, and addresses the emerging best practices. It presents the general purpose query facilities offered by LINQ in the upcoming C# 3.0 and VB 9.0 languages. A running example introduces basic LINQ concepts. Readers then learn to query unstructured data using LINQ to XML and relational data with LINQ to SQL. Finally, the book shows how to extend LINQ for custom applications. The book is very practical, anchoring each new idea with running code.