How-to-tell-a-week-is-a-shorter-week

CODE:
      public int TradingDaysNextWeek(BarHistory bars, int bar)
      {
         //add days until Sunday
         DateTime dt = bars.DateTimes[bar];          
         while (dt.DayOfWeek != DayOfWeek.Sunday)
            dt = dt.AddDays(1);

         //find the Saturday
         DateTime dt2 = dt.AddDays(6);      
         return bars.TradingDaysBetweenDates(dt, dt2);
      }