Definitin
LINQ is a methodology that simplifies and unifies the implementation of any kind of data access.
LINQ does not force you to use a specific architecture. It facilitates the implementation of several existing architectures for accessing data.
The original motivation behind LINQ was to address the conceptual and technical difficulties encountered when using databases with .NET programming languages.
With LINQ, Microsoft’s intention was to provide a solution for the problem of object-relational mapping, as well as to simplify the interaction between objects and data sources. LINQ eventually evolved into a general-purpose language-integrated querying toolset. This toolset can be used to access data coming from in-memory objects (LINQ to Objects), databases (LINQ to SQL), XML
documents (LINQ to XML), a file-system, or any other source.
LINQ allows you to access information by writing queries against various data
sources.
Advantage of LINQ
Developers can use LINQ with any data source.
They can express efficient query behavior in their programming language of choice, optionally transform/shape data query results into whatever format they want, and then easily manipulate the results. LINQ-enabled languages can provide full type-safety and compile-time checking of query expressions, and development tools can provide full intellisense, debugging, and rich refactoring support when writing LINQ code.
LINQ supports a very rich extensibility model that facilitates the creation of ery efficient domain-specific operators for data sources. The "Orcas" version of the .NET Framework ships with built-in libraries that enable LINQ support against Objects, XML, and Databases.
Check the next article ..'What is LINQ to SQL?'
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