public decimal SumField(string whereExp, string sumExp)
 {
     try
     {
         using (var t = new PackageTypeClient())
         {
             return(t.SumField(whereExp, sumExp));
         }
     }
     catch (FaultException <ValidationFault> e)
     {
         throw new Exception(e.Detail.Message, e.InnerException);
     }
     catch (Exception)
     {
         Debugger.Break();
         throw;
     }
 }