If refChild is null, insert newChild at the end of the list of child nodes. All the contents of the newChild are inserted, in the same order, before refChild. If the newChild is already in the tree, it is removed from its original position and added to its target position. For more information about inserting nodes, see Inserting Nodes into an XML Document.

If the node being inserted was created from another document, you can use XmlDocument.ImportNode(XmlNode, bool) to import the node to the current document. The imported node can then be inserted into the current document.

Namespace: System.Xml
Assembly: System.Xml (in System.Xml.dll)
Assembly Versions: 1.0.5000.0, 2.0.0.0, 4.0.0.0