Image bcode = GenerateBarCode(fullcode);

private Image GenerateBarCode(string Text)
        {
            BarcodeSymbology _symbology = BarcodeSymbology.Code128;
            Image _barcodeImage = null;
            if (_barcodeImage == null)
            {
                _barcodeImage =
                    BarcodeDrawFactory.GetSymbology(_symbology).Draw(
                    Text, 10);
            }
            return _barcodeImage;
        }

oreach (Microsoft.Office.Interop.Word.Section wordSection in document.Sections)
{

 
// добавляем изображение в колонтитул
    wordSection.Headers[Microsoft.Office.Interop.Word.WdHeaderFooterIndex.wdHeaderFooterPrimary].Shapes.; ;
                
 
}

wordSection.Headers[Microsoft.Office.Interop.Word.WdHeaderFooterIndex.wdHeaderFooterPrimary].Range.Text= "Myyy"

Image bcode = GenerateBarCode(fullcode);