You are developing a Windows Communication Foundation (WCF) service that allows customers to update financial data. The client applications call the service in a transaction. The service contract is defined as follows. (Line numbers are included for reference only.)<br /> 01 [ServiceContract]<br /> 02 public interface IDataUpdate<br /> 03 {<br /> 04 [OperationContract]<br /> 05 [TransactionFlow(TransactionFlowOption.Mandatory)]<br /> 06 void Update(string accountNumber, double amount);<br /> 07 }<br /> 08<br /> 09 ...<br /> 10 class UpdateService : IDataUpdate<br /> 11 {<br /> 12 [OperationBehavior(TransactionScopeRequired = true, TransactionAutoComplete = true)]13 public void Update(string accountNumber, double amount)<br /> 14 {<br /> 15 try<br /> 16 {<br /> 17 ...<br /> 18 }<br /> 19 catch(Exception ex)<br /> 20 {<br /> 21 WriteErrorLog(ex);<br /> 22 ...<br /> 23 }<br /> 24 }<br /> 25 }<br /> 26Customers report that the transaction completes successfully even if the Update method t