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At PDC 2005, Microsoft introduced brand new technology known as LINQ, which stands for "Language Integrated Query."The feature-set hiding behind this acronym is truly mind-boggling and worthy of a lot of attention. In short, LINQ introduces a query language similar to SQL Server's T-SQL, in C# and VB.NET. Imagine that you could issue something like a "select * from customers" statement within C# or VB.NET. This sounds somewhat intriguing, but it doesn't begin to communicate the power of LINQ.

Language Integrated Query (LINQ) is a Microsoft .NET Framework component that works as a communicator between the objects and the data. This article partially taken from the "Expert C# 5.0" - book and it will explore the different extension methods used in the LINQ using C# and IL code to discuss..

In Visual Studio 2008 running on the .NET framework 3.5, developers can not only create DataReaders and DataSets; Microsoft has also added LINQ to SQL, Entity Framework, and ADO.NET Data Services, which leverages the first two. These new options of course, mean that you have new syntaxes to learn. LINQ, which is built into Visual Basic and C#, has one implementation for LINQ to SQL and another for LINQ to Entities. In Entity Framework, you have the option to use LINQ to Entities or make queries in two other ways with Entity SQL…

A way to use LINQ to Objects in C# 2.0 with .NET Framework 2.0

Using LINQ to improve everyday code

Engine in C# which generates Linq Expressions runtime based on simple scripts

This article explains and shows examples of using LINQ and extension methods for array sorting

The release of Visual Studio 2008 updates C# to version, 3.0, with several key language enhancements and LINQ support. Part Two of this series will walk you through C#'s new LINQ support features and other time-saving enhancements.

Query features have long been a cornerstone of database applications, but with LINQ, Microsoft introduces query language features right inside of C# and VB.NET.

As discussed in earlier installments of this article series - most notably in An Introduction to LINQ and The Standard Query Operators - one of LINQ's primary components is its set of standard query operators. A query operator is a method that operates on a sequence of data and performs some task based on that data, are implemented as extension methods on types that implement the IEnumerable<T> interface. Some of the standard query operators that we've explored throughout the articles in this series include: Count, Average, First, Skip, Take, Where, and OrderBy, among others.

While these standard query operators provide a great detail of functionality, there may be situations where they fall short. The good news is that it's quite easy to create your own query operators. Underneath the covers query operators are just methods that extend types that implement IEnumerable<T> and iterate over the sequence performing some task, such as computing the total number of items in the sequence, computing the average, filtering the results, or ordering them. This article examines how to extend LINQ's functionality by creating your own extension methods.