Как можно работать с файлом на хостинге по ftp?

 using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Net;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.IO;
 
namespace WindowsFormsApplication4
{
 public partial class Form1 : Form
 {
 public Form1()
 {
 InitializeComponent();
 }
 
 private void button1_Click(object sender, EventArgs e)
 {
 System.IO.File.WriteAllText("C:/TXT/TXT.txt", textBox1.Text);
 ftpfile("/IVT.txt", @"C:/TXT/TXT.txt"); 
 }
 private void ftpfile(string ftpfilepath, string inputfilepath)
 {
 string ftphost = "111.111.111.111";
 string ftpfullpath = "ftp://" + ftphost + ftpfilepath;
 FtpWebRequest ftp = (FtpWebRequest)FtpWebRequest.Create(ftpfullpath);
 ftp.Credentials = new NetworkCredential("логин", "пароль");
 ftp.KeepAlive = true;
 ftp.UseBinary = true;
 ftp.Proxy = null;
 ftp.Method = WebRequestMethods.Ftp.AppendFile;
 FileStream fs = File.OpenRead(inputfilepath);
 byte[] buffer = new byte[fs.Length];
 fs.Read(buffer, 0, buffer.Length);
 fs.Close();
 Stream ftpstream = ftp.GetRequestStream();
 //Stream responseStream = ftp.GetResponseStream();
 ftpstream.Write(buffer, 0, buffer.Length);
 ftpstream.Close();
 }
 }
}