OpenXml (.net): SimpleField не форматируется

Question

Я пытался создать текстовый документ с номером страницы в заголовке. Я использовал SimpleField для вставки номера страницы и количества страниц. Но эти поля не зависят от цвета и размера шрифта, определенных в свойствах RunProperties, в отличие от текста (как показано на рисунке ниже).

Как отформатировать SimpleField ??

Спасибо

    private static void CreateReport(string filename)
    {
        using (var mem = new MemoryStream())
        {

            using (var wordDocument = WordprocessingDocument.Create(mem, WordprocessingDocumentType.Document, true))
            {
                // Add a main document part. 
                MainDocumentPart mainPart = wordDocument.AddMainDocumentPart();

                // Create the document structure
                mainPart.Document = new Document();
                mainPart.Document.Body = new Body();

                //Create paragraph for header
                var paragraph = new Paragraph();

                var run = paragraph.AppendChild(new Run());
                run.Append(new RunProperties()
                {
                    Bold = new Bold(),
                    FontSize = new FontSize() { Val = "48" },
                    Color = new Color() { Val = "FF0000" /*red*/ }
                }
                    );
                run.Append(new Text() { Text = "Page:" });
                run.Append(new SimpleField() { Instruction = @"PAGE" });
                run.Append(new Text() { Text = "/" });
                run.Append(new SimpleField() { Instruction = @"SECTIONPAGES" });

                //Add paragraph to header
                AddParagraphToHeader(mainPart, paragraph);

                //Save document
                wordDocument.SaveAs(filename);
            }
        }
    }

    private static void AddParagraphToHeader(MainDocumentPart mainPart, Paragraph paragraph)
    {
        var part = mainPart.AddNewPart<HeaderPart>();

        var header = new Header() { MCAttributes = new MarkupCompatibilityAttributes() { Ignorable = "w14 wp14" } };
        header.AddNamespaceDeclaration("wpc", "http://schemas.microsoft.com/office/word/2010/wordprocessingCanvas");
        header.AddNamespaceDeclaration("mc", "http://schemas.openxmlformats.org/markup-compatibility/2006");
        header.AddNamespaceDeclaration("o", "urn:schemas-microsoft-com:office:office");
        header.AddNamespaceDeclaration("r", "http://schemas.openxmlformats.org/officeDocument/2006/relationships");
        header.AddNamespaceDeclaration("m", "http://schemas.openxmlformats.org/officeDocument/2006/math");
        header.AddNamespaceDeclaration("v", "urn:schemas-microsoft-com:vml");
        header.AddNamespaceDeclaration("wp14", "http://schemas.microsoft.com/office/word/2010/wordprocessingDrawing");
        header.AddNamespaceDeclaration("wp", "http://schemas.openxmlformats.org/drawingml/2006/wordprocessingDrawing");
        header.AddNamespaceDeclaration("w10", "urn:schemas-microsoft-com:office:word");
        header.AddNamespaceDeclaration("w", "http://schemas.openxmlformats.org/wordprocessingml/2006/main");
        header.AddNamespaceDeclaration("w14", "http://schemas.microsoft.com/office/word/2010/wordml");
        header.AddNamespaceDeclaration("wpg", "http://schemas.microsoft.com/office/word/2010/wordprocessingGroup");
        header.AddNamespaceDeclaration("wpi", "http://schemas.microsoft.com/office/word/2010/wordprocessingInk");
        header.AddNamespaceDeclaration("wne", "http://schemas.microsoft.com/office/word/2006/wordml");
        header.AddNamespaceDeclaration("wps", "http://schemas.microsoft.com/office/word/2010/wordprocessingShape");

        paragraph.RsidParagraphAddition = "00164C17";
        paragraph.RsidRunAdditionDefault = "00164C17";
        header.Append(paragraph);
        part.Header = header;

        var headerPartId = mainPart.GetIdOfPart(part);
        mainPart.Document.PrependChild<HeaderReference>((new HeaderReference() { Id = headerPartId }));
    }