XmlElement.AppendChildren (gb.xml)

Sub AppendChildren ( NewChildren As XmlNode[] )

Adds all the nodes contained in the NewChildren array to the end of the list of children of this element.

This method is a faster way to do : 

Dim tNode As XmlNode
Dim element As New XmlElement("foo")

For Each tNode in NewChildren
  element.AppendChild(tNode)
Next