C# otomatik dosya indirme

string str = String.Format("Yeni sürüm mevcut!\nSizin sürümünüz: {0}.nYeni sürüm: {1}. ", applicationVersion, newVersion, aboutUpdate);

if (DialogResult.No != MessageBox.Show(str + "\nGüncellemeyi indirmek ister misiniz?", "Güncellemeyi kontrol et", MessageBoxButtons.YesNo, MessageBoxIcon.Question))

{

try

{

//string W_dosya = Application.ExecutablePath;

//WebClient W_Client = new WebClient();

//W_Client.DownloadFile(downloadURL, W_dosya);



}

catch { }

return;

using System;
using System.ComponentModel;
using System.Collections.Generic;
using System.Windows.Forms;
using System.Net;
using System.Diagnostics;
using System.Text;
namespace Update_App
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            CheckForIllegalCrossThreadCalls = false;
            InitializeComponent();
        }
        private string applicationVersion = "", newVersion = "", aboutUpdate = "";
        private string downloadURL = "DownloadURL";
        private string W_dosya = Application.StartupPath + @"\update_001";
        private void Button1_Click(object sender, EventArgs e)
        {
            string str = String.Format("Yeni sürüm mevcut!\nSizin sürümünüz: {0}.nYeni sürüm: {1}. ", applicationVersion, newVersion, aboutUpdate);

            if (DialogResult.No != MessageBox.Show(str + "\nGüncellemeyi indirmek ister misiniz?", "Güncellemeyi kontrol et", MessageBoxButtons.YesNo, MessageBoxIcon.Question))
            {
                try
                {
                    
                    WebClient W_Client = new WebClient();
                    W_Client.DownloadFileCompleted += W_Client_DownloadFileCompleted;
                    W_Client.DownloadFileAsync(new Uri(downloadURL), W_dosya);
                }

                catch (Exception ex) { MessageBox.Show(ex.Message); }

            }
        }

        private void W_Client_DownloadFileCompleted(object sender, System.ComponentModel.AsyncCompletedEventArgs e)
        {
            //İNDİRME BİTİNCEKİ İŞLEMLER
            UpdateAPP();
        }

        private void Button2_Click(object sender, EventArgs e)
        {
            MessageBox.Show(Application.ExecutablePath);
        }

        private void UpdateAPP()
        {
            string mainPath = Application.ExecutablePath;
            Process process = new Process();
            ProcessStartInfo info = new ProcessStartInfo();
            info.FileName = "cmd.exe";
            info.UseShellExecute = false;
            info.CreateNoWindow = true;
            info.Arguments = "/C TIMEOUT /T 2&DEL " + mainPath + "&MOVE " + W_dosya + "," + mainPath + "&START " + mainPath;
            process.StartInfo = info;
            process.Start();
            Application.Exit();
        }
    }
}