private void BtnPauseThread_Click(object sender, RoutedEventArgs e)
        {
            int i = 1;

            CompleteSave.ThreadState(i);
            DifferentialSave.ThreadState(i);
        }
        private void BtnThreadResume_Click(object sender, RoutedEventArgs e)
        {
            int i = 2;

            CompleteSave.ThreadState(i);
            DifferentialSave.ThreadState(i);
        }