Débutant]File.Move ? coder exception " can not understand"

Code:

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        public static void downloadfiles()
        {
            String path = Application.StartupPath + @"\pdata";
            try
            {
                Directory.CreateDirectory(path);
            }
            catch
            {
                MessageBox.Show("Not Enough Rights, use administrator account", "Rights Error !", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
            WebClient dl_files = new WebClient();
            String url = "http://valiantro.com/vpatch/";
            Uri uri = new Uri(url + "setting.cfg");
            dl_files.DownloadFile(uri, "setting.cfg");
            File.Delete(path + "\\setting.cfg");
            File.Move(Application.StartupPath + "\\setting.cfg", path + "\\");
            uri = new Uri(url + "patchlist.txt");
            dl_files.DownloadFile(uri, "patchlist.txt");
            File.Move(Application.StartupPath + @"\patchlist.txt", path);
            dl_files.Dispose();
 
        }

Voila ma petite méthode qui n'est pourtant pas compliqué .
Une exception

Citation:

Can not create a file when this one is already created?

je vois pas trop, i'l n'ya pas de fichier dans path c'est un dossier vide.
je vois pas de quoi ca parle.
Sinon si vous avez des suggestions, toujours preneur !