WCF, TransactionScope and Oracle ODP.NET

[THY02K]

hello

I have been trying to use TransactionScope with Oracle - and ran into problem: app just crashed with un-managed exception from within oracle provider/ODP.NET
http://social.msdn.microsoft.com/For...?prof=required

I am wondering, if I were to use WCF transaction, do I *HAVE* to use Transaction scope?

For example:

            [ServiceBehavior(TransactionAutoCompleteOnSessionClose=true,
                  TransactionIsolationLevel=IsolationLevel.ReadCommitted,
                  TransactionTimeout="00:00:30")]
            public class ServiceClass : IServiceClass
            {
               [OperationBehavior(TransactionAutoComplete=true, TransactionScopeRequired=true)]
               bool ISomeBankService.TransferMoney
               {
                       TransactionOptions oTxOption = new TransactionOptions();
                    oTxOption.IsolationLevel = System.Transactions.IsolationLevel.ReadCommitted;
                    oTxOption.Timeout = TimeSpan.FromMilliseconds(AppContext.DefaultDBMaxTimeoutMillisec);
                    using (oScope = new TransactionScope(TransactionScopeOption.Required, oTxOption))
                    {
                          Bank1DAO.Withdraw(1000);
                        Bank2DAO.Deposit(1000);
                    }
               }
            }

Can I just rewrite as such:

            [ServiceBehavior(TransactionAutoCompleteOnSessionClose=true,
                  TransactionIsolationLevel=IsolationLevel.ReadCommitted,
                  TransactionTimeout="00:00:30")]
            public class ServiceClass : IServiceClass
            {
               [OperationBehavior(TransactionAutoComplete=true, TransactionScopeRequired=true)]
               bool ISomeBankService.TransferMoney
               {
                       IDbConnection oConn = DBUtil.GetConnection(...);
                       IDbTranaction oTx = null;
                      
                       try
                       {
                           oTx = oConn.BeginTransaction();
                          Bank1DAO.Withdraw(1000);
                        Bank2DAO.Deposit(1000);
                        oTx.Commit();
                       } catch(Exception ex)
                       {
                           oTx.Rollback();
                           ...
                       }
                      
               }
            }

Will it work?

(This is actually not best example - usually only transaction that span user-think-time gets across WCF boundary - certainly not withdraw-deposit scenario)