IsReadOnly Property

XmlDocumentType.IsReadOnly Property


Gets a value indicating whether the node is read-only.

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

public override bool IsReadOnly { get; }

Property Value

Type: System.Boolean

true if the node is read-only; otherwise false.

Because DocumentType nodes are read-only, this property always returns true.

A read-only node is one whose properties, attributes, or children cannot be changed. However, you can remove a read-only node from the tree and insert it somewhere else.

You can remove a XmlDocumentType from a document and reinsert it back into the document as long as the document does not have an element node. Once a document has a root element, its XmlDocumentType cannot be changed.

This property is a Microsoft extension to the Document Object Model (DOM).

The following example displays information about the DocumentType node.

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

public class Sample
  public static void Main()
    // Create the XmlDocument.
    XmlDocument doc = new XmlDocument();
    doc.LoadXml("<!DOCTYPE book [<!ENTITY h 'hardcover'>]>" +
                "<book genre='novel' ISBN='1-861001-57-5'>" +
                "<title>Pride And Prejudice</title>" +
                "<style>&h;</style>" +

    // Determine whether the node is read-only.
    if (doc.DocumentType.IsReadOnly)
       Console.WriteLine("Document type nodes are always read-only");


.NET Framework
Available since 1.1
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