c# ftp helper sample code

Here's a sample code for a C# FTP helper class that can upload and download files:

using System;
using System.IO;
using System.Net;

namespace FtpHelper
{
    public class FtpClient
    {
        private readonly string _host;
        private readonly string _username;
        private readonly string _password;

        public FtpClient(string host, string username, string password)
        {
            _host = host;
            _username = username;
            _password = password;
        }

        public void UploadFile(string localFilePath, string remoteFilePath)
        {
            var request = (FtpWebRequest)WebRequest.Create($"ftp://{_host}/{remoteFilePath}");
            request.Method = WebRequestMethods.Ftp.UploadFile;
            request.Credentials = new NetworkCredential(_username, _password);

            using (var fileStream = File.OpenRead(localFilePath))
            using (var ftpStream = request.GetRequestStream())
            {
                fileStream.CopyTo(ftpStream);
            }
        }

        public void DownloadFile(string remoteFilePath, string localFilePath)
        {
            var request = (FtpWebRequest)WebRequest.Create($"ftp://{_host}/{remoteFilePath}");
            request.Method = WebRequestMethods.Ftp.DownloadFile;
            request.Credentials = new NetworkCredential(_username, _password);

            using (var response = (FtpWebResponse)request.GetResponse())
            using (var ftpStream = response.GetResponseStream())
            using (var fileStream = File.Create(localFilePath))
            {
                ftpStream.CopyTo(fileStream);
            }
        }
    }
}

To use the class, simply create a new instance of FtpClient with your FTP hostname, username, and password, and then call the UploadFile or DownloadFile method:

var ftpClient = new FtpClient("ftp.example.com", "username", "password");
ftpClient.UploadFile("localfile.txt", "remotefile.txt");
ftpClient.DownloadFile("remotefile.txt", "localfile.txt");
``