linq Ilist select

paymentApplicableTransaction subcollection is List here is how to get it:

  
   var accountTransactions = from dataObject in objectsDataContext.AccountTransactions
                    where
                        (dataObject.TransactionId == transactionID || dataObject.ParentId == transactionID) &&
                        dataObject.StatusId != deletedStatus
                    select new InvoiceRecord
                               {
                                   TransactionId = dataObject.TransactionId,
                                   Amount = dataObject.TotalAmountDue,
                                   InvoiceDueDate = dataObject.DueDate,
                                   Tax = dataObject.Tax ?? 0,
                                   AdditionalGracePeriod = dataObject.AdditionalGracePeriod,
                                   StatusId = dataObject.StatusId,
                                   RecordStatus = (int) ScopeRecordStatus.Active
                                   ,
                                   paymentApplicableTransaction = (from pats in dataObject.BillingTransactionDetails
                                                                   where pats.StatusId != deletedStatus
                                                                   select new PaymentApplicableTransaction
                                                                              {
                                                                                  AccountTransactionId =
                                                                                      pats.AccountTransactionId
                                                                                  ,
                                                                                  BillingTransactionId =
                                                                                      pats.BillingTransactionId

                                                                              }).OfType<IPaymentApplicableTransaction>()
                                       .ToList()
                               };