XmlDocument.CreateDocumentFragment creates an XmlDocumentFragment.
Option Explicit Option Strict Imports System Imports System.IO Imports System.Xml Public Class Sample Public Shared Sub Main() Dim doc As New XmlDocument() doc.LoadXml("<items/>") Dim docFrag As XmlDocumentFragment = doc.CreateDocumentFragment() docFrag.InnerXml = "<item>widget</item>" doc.DocumentElement.AppendChild(docFrag) Console.WriteLine(doc.OuterXml) End Sub End Class