In VB.Net you can do this:
Imports System.Xml
Module XMLMerge
Sub MergeXML(ByVal XMLPath As String, ByVal XMLFile1 As String, ByVal XMLFile2 As String, ByVal XMLFile3 As String)
Dim xmlreader1 As New XmlTextReader(XMLPath & XMLFile1)
Dim xmlreader2 As New...