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XmlElement.Prefix Property

Gets or sets the namespace prefix of this node.

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

public override string Prefix { get; set; }

Property Value

Type: System.String
The namespace prefix of this node. If there is no prefix, this property returns String.Empty.


This node is read-only


The specified prefix contains an invalid character.

The specified prefix is malformed.

The namespaceURI of this node is null.

The specified prefix is "xml" and the namespaceURI of this node is different from

Setting this property changes the Name property, which holds the qualified name for an XmlElement. However, changing the prefix does not change the namespace URI of the element.

The following example displays information on the ISBN element.

using System;
using System.IO;
using System.Xml;

public class Sample
  public static void Main()

    XmlDocument doc = new XmlDocument();
    doc.LoadXml("<book xmlns:bk='urn:samples'>" +
                "<bk:ISBN>1-861001-57-5</bk:ISBN>" +
                "<title>Pride And Prejudice</title>" +

    // Display information on the ISBN element.
    XmlElement elem = (XmlElement) doc.DocumentElement.FirstChild;
    Console.Write("{0}:{1} = {2}", elem.Prefix, elem.LocalName, elem.InnerText);
    Console.WriteLine("\t namespaceURI=" + elem.NamespaceURI);

#using <mscorlib.dll>
#using <System.Xml.dll>
using namespace System;
using namespace System::IO;
using namespace System::Xml;

int main()
    XmlDocument* doc = new XmlDocument();
    doc->LoadXml(S"<book xmlns:bk='urn:samples'>" 
                 S"<title>Pride And Prejudice</title>" 

    // Display information on the ISBN element.
    XmlElement* elem = dynamic_cast<XmlElement*> (doc->DocumentElement->FirstChild);
    Console::Write(S"{0}:{1} = {2}", elem->Prefix, elem->LocalName, elem->InnerText);
    Console::WriteLine(S"\t namespaceURI={0}", elem->NamespaceURI);

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98, Windows CE, Windows Mobile for Smartphone, Windows Mobile for Pocket PC, Xbox 360, Zune

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0, 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 3.5, 2.0, 1.0

XNA Framework

Supported in: 3.0, 2.0, 1.0