LINQ Links

The MSDN Site: http://msdn.microsoft.com/en-us/vbasic/aa904594.aspx 

Wikipedia: http://en.wikipedia.org/wiki/Language_Integrated_Query 

LINQ (Language Integrated Query) was delivered in .NET 3.5 and Visual Studio 2008. It addreses O/R mapping issues by making query operations like SQL statements part of the programming language. It also offers built-in support for querying in-memory collections like arrays or lists, XML, DataSets, and relational databases.It also allows you to develop queries in your native development language (with IntelliSense).

LINQ to XML: It is recommended that developers switch over from coding against the XmlDocument DOM to LINQ's XDocument

LINQ to SQL: Deprecated... use LINQ to Entities

LINQ to Entities: Entity Framework Learning Guide

Books:

• Essential LINQ (Microsoft .NET Development Series)
• Pro LINQ: Language Integrated Query in C# 2008 (Windows.Net)
• Programming Entity Framework
• LINQ in Action