With LINQ, a query is a first-class language construct, just like classes, methods, and events. When you write queries, the most visible "language-integrated" part of LINQ is the query expression. You write query expressions in a declarative query syntax.
Language-Integrated Query (LINQ) provides language-level querying capabilities, and a higher-order function API to C# and Visual Basic, that enable you to write expressive declarative code.
LINQ offers a consistent model for queries on data across various kinds of data sources and formats. In a LINQ query, you're always working with objects.
Most queries in the introductory Language Integrated Query (LINQ) documentation use the LINQ declarative query syntax. The C# compiler translates query syntax into method calls. These method calls implement the standard query operators. They have names such as Where, Select, GroupBy, Join, Max, and Average. You call them directly by using method syntax instead of query syntax. Query syntax and ...
This tutorial teaches you how to generate sequences with LINQ, write methods for use in LINQ queries, and distinguish between eager and lazy evaluation.
Query variable In LINQ, a query variable is any variable that stores a query instead of the results of a query. More specifically, a query variable is always an enumerable type that produces a sequence of elements when iterated over in a foreach statement or a direct call to its IEnumerator.MoveNext () method.
LINQ makes a query a first-class language construct in Visual Basic. You write queries against strongly typed collections of objects by using language keywords and familiar operators.
This walkthrough shows how C# language features are used in LINQ query expressions.