private void StartDownload(string URL, string fileName)
        {
            Thread thread = new Thread(() =>
            {
                WebClient wc = new WebClient();
                wc.DownloadProgressChanged += new DownloadProgressChangedEventHandler(ClientDownloadProgressChanged);
                wc.DownloadFileCompleted += (sender, e) => ClientDownloadFileCompleted(sender, e, fileName);
                wc.DownloadFileAsync(new Uri(URL), fileName);
            });
            thread.Start();
            rtBox.Text = fileName.Replace(directory, "") + " está sendo baixado";
        }
        void ClientDownloadProgressChanged(object sender, DownloadProgressChangedEventArgs e)
        {
            BeginInvoke((MethodInvoker)delegate
            {
                rtBox.Text += ".";
                if (rtBox.Text == "data.rar está sendo baixado.....")
                    rtBox.Text = "data.rar está sendo baixado";

                double bytesIn = double.Parse(e.BytesReceived.ToString());
                double totalBytes = double.Parse(e.TotalBytesToReceive.ToString());
                double percentage = bytesIn / totalBytes * 100;
                label2.Text = "Baixado " + (e.BytesReceived) / 1024 + " KBs de " + (e.TotalBytesToReceive) / 1024 + " KBs";
                progressBar.Value = int.Parse(Math.Truncate(percentage).ToString());
            });
        }
        void ClientDownloadFileCompleted(object sender, AsyncCompletedEventArgs e, string fileName)
        {
            BeginInvoke((MethodInvoker)delegate
            {
                rtBox.Text = string.Empty;
                rtBox.Text += "Arquivo " + fileName.Replace(directory, "") + " baixado\n";

                if (fileName.Replace(directory, "") == "data.rar")
                {
                    label2.Text = "Atualização completa!";
                    UnRAR(fileName);
                    LineChanger(server_version, "pid.txt", 4);
                    Process.Start(File.ReadLines("pid.txt").Skip(5).Take(1).First());
                    Application.Exit();
                }
            });
        }