Как записать информацию в doc-файл

StreamWriter sw;
DitectoryInfo di = new DitectoryInfo("Papka");
di.Create();
sw = File.CreateText("Papka/DOCUMENT.doc");
sw.WriteLine("Текст");

string way = @"Papka/DOCUMENT.doc";
var proc = New System.Diagnostics.Process();
proc.StartInfo.FileName = way;
proc.StartInfo.UseShellExecute = true;
proc.Start();

using Microsoft.Office.Interop.Word;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Diagnostics;
 
namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
 
        private void button1_Click(object sender, EventArgs e)
        {          
                Microsoft.Office.Interop.Word.Application winword = new Microsoft.Office.Interop.Word.Application();
                winword.Visible = false;
 
                object missing = System.Reflection.Missing.Value;
                Microsoft.Office.Interop.Word.Document document = winword.Documents.Add(ref missing, ref missing, ref missing, ref missing);
                document.Content.SetRange(0, 0);
                document.Content.Text = "This is test document";
 
                object filename = @"d:\temp2.doc";
                document.SaveAs(ref filename);
                document.Close(ref missing, ref missing, ref missing);
                document = null;
                winword.Quit(ref missing, ref missing, ref missing);
                winword = null;
                //MessageBox.Show("Document created successfully !");
 
 
 
                Process myProcess = new Process();
                    myProcess.StartInfo.UseShellExecute = true;
                    myProcess.StartInfo.FileName = @"d:\temp2.doc";
                    myProcess.StartInfo.CreateNoWindow = true;
                    myProcess.Start();
                                       
        }
    }
}

document.Content.Text = "This is test document";

document.Content.Text = "Вторая строка";

 Microsoft.Office.Interop.Word.Application winword = new Microsoft.Office.Interop.Word.Application();