• Article

Extensions.Descendants<T> Method (IEnumerable<T>, XName)

Microsoft Silverlight will reach end of support after October 2021. Learn more.

Returns a filtered collection of elements that contains the descendant elements of every element and document in the source collection. Only elements that have a matching XName are included in the collection.

Namespace:  System.Xml.Linq
Assembly:  System.Xml.Linq (in System.Xml.Linq.dll)

Syntax

'Declaration
<ExtensionAttribute> _
Public Shared Function Descendants(Of T As XContainer) ( _
    source As IEnumerable(Of T), _
    name As XName _
) As IEnumerable(Of XElement)

public static IEnumerable<XElement> Descendants<T>(
    this IEnumerable<T> source,
    XName name
)
where T : XContainer

Type Parameters

  • T
    The type of the objects in source, constrained to XContainer.

Parameters

Return Value

Type: System.Collections.Generic.IEnumerable<XElement>
An IEnumerable<T> of XElement that contains the descendant elements of every element and document in the source collection. Only elements that have a matching XName are included in the collection.

Usage Note

In Visual Basic and C#, you can call this method as an instance method on any object of type IEnumerable<T>. When you use instance method syntax to call this method, omit the first parameter.

Exceptions

Exception Condition
ArgumentNullException

source is nulla null reference (Nothing in Visual Basic).

Remarks

Visual Basic users can use the Language-Integrated Axes in Visual Basic (LINQ to XML) instead of using this axis method explicitly.

This method uses deferred execution.

Version Information

Silverlight

Supported in: 5, 4, 3

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0

XNA Framework

Supported in: Xbox 360, Windows Phone OS 7.0

Platforms

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.