.NET Framework Class Librar ...


.NET Framework Class Library
System.Linq Namespace

The System.Linq namespace provides classes and interfaces that support queries that use Language-Integrated Query (LINQ).

The Enumerable class contains LINQ standard query operators that operate on objects that implement IEnumerable<(Of <(T>)>).

The Queryable class contains LINQ standard query operators that operate on objects that implement IQueryable<(Of <(T>)>).

Classes
  ClassDescription
Public classEnumerableProvides a set of static (Shared in Visual Basic) methods for querying objects that implement IEnumerable<(Of <(T>)>).
Public classLookup<(Of <(TKey, TElement>)>)Represents a collection of keys each mapped to one or more values.
Public classQueryableProvides a set of static (Shared in Visual Basic) methods for querying data structures that implement IQueryable<(Of <(T>)>).
Interfaces
  InterfaceDescription
Public interfaceIGrouping<(Of <(TKey, TElement>)>)Represents a collection of objects that have a common key.
Public interfaceILookup<(Of <(TKey, TElement>)>)Defines an indexer, size property, and Boolean search method for data structures that map keys to IEnumerable<(Of <(T>)>) sequences of values.
Public interfaceIOrderedEnumerable<(Of <(TElement>)>)Represents a sorted sequence.
Public interfaceIOrderedQueryableRepresents the result of a sorting operation.
Public interfaceIOrderedQueryable<(Of <(T>)>)Represents the result of a sorting operation.
Public interfaceIQueryableProvides functionality to evaluate queries against a specific data source wherein the type of the data is not specified.
Public interfaceIQueryable<(Of <(T>)>)Provides functionality to evaluate queries against a specific data source wherein the type of the data is known.
Public interfaceIQueryProviderDefines methods to create and execute queries that are described by an IQueryable object.
Tags :


Community Content

Thomas Lee
System.Linq using statement erroneous

Why does the compiler say that 'Linq' does not exist in the 'System' namespace when specifying a using statement as follows:




using System.Linq;


----

Answer :


Add System.Core reference ( version 3.5 )



Page view tracker