Xmlns Property
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XNamespace.Xmlns Property


Gets the XNamespace object that corresponds to the xmlns URI (http://www.w3.org/2000/xmlns/).

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

public static XNamespace Xmlns { get; }

Property Value

Type: System.Xml.Linq.XNamespace

The XNamespace that corresponds to the xmlns URI (http://www.w3.org/2000/xmlns/).

When you declare namespaces, the namespace attributes themselves are in the xmlns namespace. The W3C standard specifies that this namespace does not have to be declared as an attribute in the XML tree. It is a reserved namespace that is always automatically available in the XML parser.

The following example shows how to add a namespace to an XML tree. The namespace for the attribute that declares the namespace is the namespace returned by this property.

XNamespace aw = "http://www.adventure-works.com";
XElement root = new XElement(aw + "Root",
    new XAttribute(XNamespace.Xmlns + "aw", "http://www.adventure-works.com"),
    new XElement(aw + "Child", "content")

In Visual Basic, the preferred idiom is:


Imports <xmlns:aw='http://www.adventure-works.com'>

Module Module1
    Sub Main()
        Dim root As XElement = _
    End Sub
End Module

This example produces the following output:

<aw:Root xmlns:aw="http://www.adventure-works.com">

Universal Windows Platform
Available since 4.5
.NET Framework
Available since 3.5
Portable Class Library
Supported in: portable .NET platforms
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Windows Phone
Available since 8.1
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