using (WordprocessingDocument doc = WordprocessingDocument.Open("testd.docx", true))
        {
            var body = doc.MainDocumentPart.Document.Body;
            List<OpenXmlElement> changes =
           body.Descendants<ParagraphPropertiesChange>()
           //.Where(c => c.Author.Value == authorName)
           .Cast<OpenXmlElement>().ToList();   // number is 0

            List<OpenXmlElement> deletions =
            body.Descendants<Deleted>()
            //.Where(c => c.Author.Value == authorName)
            .Cast<OpenXmlElement>().ToList();   // number is 0

            var insertions =
           body.Descendants<Inserted>()
           //.Where(c => c.Author.Value == authorName)
           .Cast<OpenXmlElement>().ToList();  // number is 0

        }