LINQ 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.
More details on LINQ: http://www.c-sharpcorner.com/1/180/linq.aspx
LINQ stands for language integrated query.
It is a uniform programming model for querying and manipulation data with a consistent model from any data source.
It can also be called as an another tool for embedding SQL queries into code.
It extends powerful query capabilities to c#, vb.net languages.
from id in source
from id in source | where condition
[orderby ordering , ordering, ....]
select expr | group expr by key
[into id query]
LINQ-Language Integrated Query.This is a .Net Framework 3.5 feature.This feature is very usefull to query on collections.
LINQ extends the language by the addition of query expressions, which are akin to SQL statements, and can be used to conveniently extract and process data from arrays, enumerable classes, XML documents, relational databases, and third-party data sources. Other uses, which utilize query expressions as a general framework for readably composing arbitrary computations, include the construction of event handlers or monadic parsers.
LINQ is the Feature Which is Introduced in .NET Framework 3.5. It is used to intragrate the SQL server to Visual Studio .