Проверка на успешное скачивание файла

void DownloadKMR()
        {
            if (System.IO.File.Exists(Application.StartupPath + @"\data\" + Additional.KMRLauncher.FNInstallerKMR) == true)
            {
                btnInstKMR.Enabled = true;
                //btnAutoInstKMR.Enabled = true;
                bprgBar.Value = 100;
                lblCaptionDownloadProcess.Text = "Скачивание завершено!";
            }
            else
            {
                var client = new WebClient();
                var uri = new Uri(GetLinkKMR());
                client.DownloadFileCompleted += new AsyncCompletedEventHandler(client_DownloadFileCompleted);
                client.DownloadProgressChanged += new DownloadProgressChangedEventHandler(client_DownloadProgressChanged);
                bprgBar.Value = 0;
                lblCaptionDownloadProcess.Text = "Скачивание игры...";
                if (System.IO.File.Exists(Application.StartupPath + @"\data\" + Additional.KMRLauncher.FNInstallerKMR + ".downloads") == true)
                    System.IO.File.Delete(Application.StartupPath + @"\data\" + Additional.KMRLauncher.FNInstallerKMR + ".downloads");
                client.DownloadFileAsync(uri, Application.StartupPath + @"\data\" + Additional.KMRLauncher.FNInstallerKMR + ".downloads");
            }
        }
 
private void client_DownloadFileCompleted(object sender, AsyncCompletedEventArgs e)
        {
            if (e.Cancelled == false)
            {
                System.IO.File.Move(Application.StartupPath + @"\data\" + Additional.KMRLauncher.FNInstallerKMR + ".downloads", Application.StartupPath + @"\data\" + Settings.FNInstallerKMR);
                DownloadKMR();
            }
        }
 
        private void client_DownloadProgressChanged(object sender, DownloadProgressChangedEventArgs e)
        {
            bprgBar.Value = e.ProgressPercentage;
        }

private void client_DownloadFileCompleted(object sender, AsyncCompletedEventArgs e)
        {
            if (e.Error != null)
            {
                // Ошибка!
                File.Delete(...);
            }
            else if (e.Cancelled == false)
            {
                System.IO.File.Move(Application.StartupPath + @"\data\" + Additional.KMRLauncher.FNInstallerKMR + ".downloads", Application.StartupPath + @"\data\" + Settings.FNInstallerKMR);
                DownloadKMR();
            }
        }