public static void PutRates(Model.Rates rate)
 {
     try
     {
         using (var context = DBParkingHRSEntities.Instance)
         {
             context.Entry(rate).State = EntityState.Modified;
             context.SaveChanges();
         }
     }
     catch (Exception ex)
     {
         throw ex;
     }
 }
 public static void PostRates(Model.Rates rate)
 {
     try
     {
         using (var context = DBParkingHRSEntities.Instance)
         {
             rate.Date = DateTime.Now;
             context.Rates.Add(rate);
             context.SaveChanges();
         }
     }
     catch (Exception ex)
     {
         throw ex;
     }
 }