private void Exitbutton2_Click(object sender, RoutedEventArgs e) { XMLHelper.BBUsersDeleter("BBUsersFile"); GlobalData.BBRejisterflag = false; this.PhoneNumbertextBox.Text = null; this.VerifyBox.Text = null; this.PhoneNumbertextBox.IsEnabled = true; this.VerifyBox.IsEnabled = true; this.SendVerifyButton.IsEnabled = true; }