BeatsMusic.Importer.RdioLogin.Button_Click C# (CSharp) Метод

        private void Button_Click(object sender, System.Windows.RoutedEventArgs e)
        {
            pin = 0;
            if (!string.IsNullOrEmpty(txtPin.Text) && txtPin.Text.Length == 4 && int.TryParse(txtPin.Text, out pin))
            {
                LockUI();
                BackgroundWorker bw = new BackgroundWorker();
                bw.DoWork += bw_DoWork;
                bw.RunWorkerCompleted += bw_RunWorkerCompleted;
                bw.RunWorkerAsync();
            }
            else
            {
                MessageBox.Show("Pin has to be 4 numbers long");
            }
        }