public void AddPI(object doc, string data)
{
XmlDocument xmlDocument = InMetaXmlUtils.TryGetXmlDocument(doc);
if (xmlDocument != null)
{
XmlNode firstChild = xmlDocument.FirstChild;
if (firstChild != null && (firstChild.NodeType == XmlNodeType.ProcessingInstruction && firstChild.Name == "xml"))
{
xmlDocument.RemoveChild(firstChild);
}
XmlProcessingInstruction processingInstruction = xmlDocument.CreateProcessingInstruction("xml", data);
xmlDocument.InsertBefore((XmlNode)processingInstruction, xmlDocument.FirstChild);
}
else
{
object firstChild = InMetaXmlUtils.InteropGetFirstChild(doc);
if (firstChild != null && (InMetaXmlUtils.InteropGetNodeType(firstChild) == 7 && InMetaXmlUtils.InteropGetNodeName(firstChild) == "xml"))
{
InMetaXmlUtils.InteropRemoveChild(doc, firstChild);
}
object processingInstruction = InMetaXmlUtils.InteropCreateProcessingInstruction(doc, "xml", data);
InMetaXmlUtils.InteropInsertBefore(doc, processingInstruction, InMetaXmlUtils.InteropGetFirstChild(doc));
}
}