I'm beside myself, I've tried everything, nothing works. I"m using C# and taking an existing XML Document that has a comment line at the top, no schema ref. I wrote schema for these pre-made XML documents and all I want to do is programatically add a line at the top and bottom to add a schema ref. I've tried everything. I can add nodes that are child, but not add a top level parent node, the following throws errors because the root is the first child, and I want to add a schema ref, which is the top level node!

XmlDocument doc = new XmlDocument();
FileStream myFile = new FileStream(@"C:\ShippingOrder.xml", FileMode.Open);
doc.Load(myFile);
XmlNode root = doc.FirstChild;
//create new node
XmlElement elem = doc.CreateElement("Lio");
elem.InnerText = "ThisWillbetheSchemaRef";
//add node to the document
root.InsertBefore(elem, root.FirstChild);

myFile.Close();

Ie, I have a document Shipping:

<?xml version="1.0" encoding="ISO-8859-1"?>
<shipTo>
<name>Tom Jones</name>
<address>555 windchester drive</address>
<city>San Francisco</city>
<state>CA</state>
<country>United States</country>
</shipTo>
<items>
<item>
<title>Empires</title>
<quantity>1</quantity>
<price>50.00</price>
</item>
<item>
<title>Desert Wines</title>
<quantity>1</quantity>
<price>10.90</price>
</item>
<item>
<title>Cheese O' Rama</title>
<quantity>1</quantity>
<price>9.95</price>
</item>
</items>

and I want it to be:

<?xml version="1.0" encoding="ISO-8859-1"?>
<shipOrder xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="http://localhost/XMLDemo/Shipping Order.xsd">
<shipTo>
<name>Tom Jones</name>
<address>555 windchester drive</address>
<city>San Francisco</city>
<state>CA</state>
<country>United States</country>
</shipTo>
<items>
<item>
<title>Empires</title>
<quantity>1</quantity>
<price>50.00</price>
</item>
<item>
<title>Desert Wines</title>
<quantity>1</quantity>
<price>10.90</price>
</item>
<item>
<title>Cheese O' Rama</title>
<quantity>1</quantity>
<price>9.95</price>
</item>
</items>
</shipOrder>

HELP!!!!