XmlDocument.CreateComment creates an XmlComment containing the specified data.
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("<book genre='Computer' ISBN='1-111111-57-5'>" & _
"<title>C#</title>" & _
"</book>")
Dim newComment As XmlComment
newComment = doc.CreateComment("Sample XML document")
Dim root As XmlElement = doc.DocumentElement
doc.InsertBefore(newComment, root)
doc.Save(Console.Out)
End Sub 'Main
End Class 'Sample