LINQ is an acronym for Language Integrated Query, which is descriptive for where    it’s used and what it does. The Language Integrated part means that LINQ is part    of programming language syntax. In particular, both C# and VB are languages that    ship with .NET and have LINQ capabilities. Another programming language that supports    LINQ is Delphi Prism. The other part of the definition, Query, explains what LINQ    does; LINQ is used for querying data. Notice that I used the generic term “data”    and didn’t indicate what type of data. That’s because LINQ can be used to query    many different types of data, including relational, XML, and even objects. Another    way to describe LINQ is that it is programming language syntax that is used to query    data.