How can I get an XmlNode from a DataSet?

I'm trying to write an XML document using an XmlWriter and an XmlDocument. I have 4 child nodes to write in the root element, and the first three worked out fine. The last one, however, is being generated from a DataSet. Here is my abbreviated code:

DataSetds; 

XmlNode RecordSet = xdoc.CreateNode(XmlNodeType.Element, "RecordSet", "");
XmlNode RecordSetTotal = xdoc.CreateNode(XmlNodeType.Attribute, "TOTAL", "");
RecordSetTotal.Value = gvExcelData.Rows.Count.ToString();
RecordSet.Attributes.SetNamedItem(RecordSetTotal);
RecordSet.InnerXml = ds.GetXml();
root.AppendChild(RecordSet);

Which outputs the XML:

<RecordSet TOTAL="2">
    <RecordSet>
        <Record>
            <Column 1></Column 1>
            <Column 2>开发者_JS百科</Column 2>
            <Column 3></Column 3>
            <Column 4></Column 4>
            <Column 5></Column 5>
        </Record>
        <Record>
            <Column 1></Column 1>
            <Column 2></Column 2>
            <Column 3></Column 3>
            <Column 4></Column 4>
            <Column 5></Column 5>
        </Record>
    </RecordSet>
</RecordSet>

I need only one root element RecordSet and it needs to have an attribute Total equal to the total number of records. If somehow I could parse the XML string I get from ds.GetXml() into an XmlNode directly, I could then set my attributes and be on my way. But I could be wrong. Any suggestions?

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I'd suggest doing exactly that. Load it into an XmlDocument, process it, copy it over.