Adding XmlNode from one XmlDoc to another

I want to add an XmlNode from one doc to another,

Basically, I have

one doc,

<UserDatabase>
<UserSet>
<User/>
<User/>
</UserSet>
<UserSet>
<User/
....
</UserDatabase>

The UserSets are created on their own by other methods under different XmlDocuments.  I then want to pass all of these Documents whose top node is <UserSet> and merge them into the above large XML file.  What is the easiest way to do this?  I am under the impression you cannot just get a node from one xmlDocument and add it to another because it would mess up the parent information.  So, do I need to copy all the nodes by hand, can I copy them easily?  

LVL 5
jjacksnAsked:
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purpleblobCommented:
Not sure if this is exactly what you're after but you can use ImportNode and AppendChild to take an element from one document and place it in another - for example:

The following loads an xml document (doc1.xml) then runs an XPath statement to get some nodes back from it, next it's loads a second xml document (doc2.xml) and then places each of the nodes from

// load the first xml doc
System.Xml.XmlDocument xmldoc1 = new System.Xml.XmlDocument();
xmldoc1.Load("doc1.xml");

// load the second xml doc
System.Xml.XmlDocument xmldoc2 = new System.Xml.XmlDocument();
xmldoc2.Load("doc2.xml");

// do some processing to get the nodes we want to place from doc1 into doc2
System.Xml.XmlNodeList nodes = xmldoc.SelectNodes("//UserSet");

// loop through the nodes and import them into the second doc
foreach(System.Xml.XmlNode node in nodes)
{
   System.Xml.XmlNode src = xmldoc2.ImportNode(node, true);
   xmldoc2.DocumentElement.AppendChild(src);
}

Hope this helps

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