Word manipulation c#

using System;
using System.IO;
using System.Text;
using Microsoft.Office.Interop.Word;

namespace MyProjectNS
{
    public class HtmlWordDocument : IDisposable
    {
        private Application application;
        private Document document;

        private string path;
        private bool editing;

        public enum DocumentSection { Content, Header, Footer }

        public HtmlWordDocument(string path)
        {
            this.path = path;
            this.editing = false;
            if (File.Exists(path)) File.Delete(path);

            application = new Application();

            if (editing)
            {
                document = application.Documents.Open(path, ReadOnly: false, Visible: false);
            }
            else
            {
                document = application.Documents.Add(Visible: false);
            }
            document.Activate();
        }

        public void Write(DocumentSection sectionType, string file)
        {
            try
            {
                if (sectionType == DocumentSection.Content)
                {
                    application.Selection.InsertFile(file);
                }
                else
                {
                    foreach (Section wordSection in document.Sections)
                    {
                        Range range;

                        if (sectionType == DocumentSection.Header)
                            range = wordSection.Headers[WdHeaderFooterIndex.wdHeaderFooterPrimary].Range;
                        else
                            range = wordSection.Footers[WdHeaderFooterIndex.wdHeaderFooterPrimary].Range;

                        range.InsertFile(file);
                    }
                }
            }
            catch (Exception ex)
            {
                ((_Document)document).Close(SaveChanges: false);
                ((_Application)application).Quit(SaveChanges: false);
            }
        }

        private void WriteSection(DocumentSection sectionType, string file)
        {
            Write(sectionType, file);
        }

        public void WriteContent(string file)
        {
            WriteSection(DocumentSection.Content, file);
        }

        public void WriteHeader(string file)
        {
            WriteSection(DocumentSection.Header, file);
        }

        public void WriteFooter(string file)
        {
            WriteSection(DocumentSection.Footer, file);
        }

        public void Save()
        {
            if (editing)
            {
                application.Documents.Save(true);
            }
            else
            {
                document.SaveAs(path);
            }
        }

        #region IDisposable Members

        public void Dispose()
        {
            ((_Document)document).Close(SaveChanges: true);
            ((_Application)application).Quit(SaveChanges: true);
        }

        #endregion
    }
}