XMLNodes1.xml

<?xml version="1.0" encoding="utf-8" ?>
<NODES>
    <NODE Text="&lt;font color=blue&gt;Click here to open 9Rays site&lt;/font&gt;" Key="Postback"
        NavigateUrl="http://www.9rays.net/" CanBeSelected="False" NavigateTarget="_blank" />
    <NODE Text="This node postbacks on select" Key="Postback" PostBackOnSelect="True" />
    <NODE Text="New NodeSrc: &lt;b&gt;XMLNodes2.xml&lt;/b&gt;" NodeSrc="NodeSrc/XMLNodes2.xml"
        Key="XMLNodes2.xml" />
    <NODE Text="This one can not be selected" Key="k1" CanBeSelected="False" />
</NODES>

/XMLNodes2.xml

<?xml version="1.0" encoding="utf-8" ?>
<NODES>
    <NODE Text="hello" Key="s">
        <NODE Text="how are you" Key="s3" NodeType="how are you">
            <NODE Text="somethig here" Key="somethig here">
                <NODE Text="good choice" Key="good choice"></NODE>
                <NODE Text="develop it" Key="develop it" />
            </NODE>
        </NODE>
        <NODE Text="Another node" Key="s2" />
    </NODE>
</NODES>