An Optimized Code to Get Last Working Day

Here is the code how we could get previous working day with respect to Today's day.

   DateTime GetPreviousWorkingDay()
   {
       DateTime dtPrevDay;
       dtPrevDay = DateTime.Today.AddDays(-1);
       switch (dtPrevDay.DayOfWeek)
       {
           case System.DayOfWeek.Saturday:
               dtPrevDay = dtPrevDay.AddDays(-1);
               break;
           case System.DayOfWeek.Sunday:
               dtPrevDay = dtPrevDay.AddDays(-2);
               break;
       }
       return dtPrevDay;
   }