Удаление колонтитулов в Word 2003 (файл rtf)

wordapp.ActiveDocument.Sections[1].Headers[Word.WdHeaderFooterIndex.wdHeaderFooterPrimary].Range.Delete();
wordapp.ActiveDocument.Sections[1].Footers[Word.WdHeaderFooterIndex.wdHeaderFooterPrimary].Range.Delete();

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Word = Microsoft.Office.Interop.Word;
using DocumentFormat.OpenXml;
using DocumentFormat.OpenXml.Packaging;
using DocumentFormat.OpenXml.Wordprocessing;
 
namespace forWord
{
    class Program
    {
        static void Main(string[] args)
        {
            Word.Application wordapp;
            wordapp = new Word.Application();
            wordapp.Visible = true;
            Word.Document worddocument;
            Object template = Type.Missing;
            Object newTemplate = false;
            Object documentType = Word.WdNewDocumentType.wdNewBlankDocument;
            Object visible = true;
 
            Object confirmConversions = true;
            worddocument = wordapp.Documents.Open(@"C:\Users\Noks\Desktop\1.doc", ref confirmConversions);
 
            Object fileName = @"C:\Users\Noks\Desktop\1.doc";
            Object fileFormat = Word.WdSaveFormat.wdFormatDocument;
            Object lockComments = false;
            Object password = "";
            Object addToRecentFiles = false;
            Object writePassword = "";
            Object readOnlyRecommended = false;
            Object embedTrueTypeFonts = false;
            Object saveNativePictureFormat = false;
            Object saveFormsData = false;
            Object saveAsAOCELetter = Type.Missing;
            Object encoding = Type.Missing;
            Object insertLineBreaks = Type.Missing;
            Object allowSubstitutions = Type.Missing;
            Object lineEnding = Type.Missing;
            Object addBiDiMarks = Type.Missing;
 
            //object patternstyle = Word.WdStyleType.wdStyleTypeParagraph;
            //Word.Style wordstyle = worddocument.Styles.Add("myStyle", ref patternstyle);
 
 
            object begin = Type.Missing;
            Object end = Type.Missing;
            Word.Range wordrange = worddocument.Range(ref begin, ref end);
            wordrange.Find.Text.Replace("Сопроводительная ", "QWERWERRWTWER");
            //object oWordStyle = wordstyle;
            wordrange.PageSetup.TopMargin = 19.8f;
            wordrange.PageSetup.BottomMargin = 19.8f;
            wordrange.PageSetup.LeftMargin = 51f;
            wordrange.PageSetup.RightMargin = 28.3f;
            //wordrange.set_Style(ref oWordStyle);
            Word.Table wordtable = worddocument.Tables[1];
            wordapp.ActiveDocument.Sections[1].Headers[Word.WdHeaderFooterIndex.wdHeaderFooterPrimary].Range.Delete();
            wordapp.ActiveDocument.Sections[1].Footers[Word.WdHeaderFooterIndex.wdHeaderFooterPrimary].Range.Delete();
 
            //wordtable.Cell(1, 1).Delete();
            fileName = @"C:\Users\Noks\Desktop\1.rtf";
 
            worddocument.SaveAs(ref fileName, ref fileFormat, ref lockComments,
            ref password, ref addToRecentFiles, ref writePassword,
            ref readOnlyRecommended, ref embedTrueTypeFonts,
            ref saveNativePictureFormat, ref saveFormsData,
            ref saveAsAOCELetter, ref encoding, ref insertLineBreaks,
            ref allowSubstitutions, ref lineEnding, ref addBiDiMarks);
 
            Object saveChanges = Word.WdSaveOptions.wdPromptToSaveChanges;
            Object originalFormat = Word.WdOriginalFormat.wdWordDocument;
            Object routeDocument = Type.Missing;
            ((Word._Application)wordapp).Quit(ref saveChanges,
                            ref originalFormat, ref routeDocument);
            wordapp = null;
 
            //wordapp.Documents.Close();                          //для Word 2010
            //RemoveHeadersFooters((string)fileName);
        }
    }
}

worddocument.PageSetup.HeaderDistance = 0;
worddocument.PageSetup.FooterDistance = 0;