public void CheckIsTimeToPrint()
 {
     Task.Factory.StartNew(() =>
     {
         /*
          * Dispatcher.BeginInvoke(new Action(delegate
          * {
          *  ReminderWindow autoShownReminderWindow = new ReminderWindow();
          * }));
          */
         while (true)
         {
             if (commonSet.IsTimeToPrint())
             {
                 ShowPrintingWindow();
             }
             Thread.Sleep(60000);
         }
     });
 }