Ideas for refreshing whole contents of Word with VSTO document-level addin

Hi all,

Do you have any ideas/scenarios to refresh whole contents in Word document which is attached VSTO document-level addin?
The best scenario for me is "Re-open" the another document with keeping the attachment of VSTO addin to extract not only the document-body contents but also header, footer and page-setup related contents. I've tried "InsertXML" method, succeeded in cloning the body but failed in cloning the contents outside...

        private static void SimpleClone(Document docFrom, Document docTo, string saveAsDocTo)
        {
            (docTo.Range() as Range).InsertXML((docFrom.Range() as Range).WordOpenXML);
            docTo.SaveAs2(FileName: saveAsDocTo);
        }