[求助]C#如何写嵌套事务

myConn.Open();

myTrans = myConn.BeginTransaction();



try

{

    EPaybill = MPaybill.SelectByID(paybillEntry.FPARENTID);  //订单表头记录



    MPaybillEntry.Insert(myTrans, paybillEntry);  //插入订单分录



    EPaybill.FPASSTOTALAMOUNT = this.GetOrderTotalAmount(paybillEntry.FPARENTID);  // 获取订单总金额

    

    // 现在的问题是：在此这前事务还没提交，无法获取刚插入的记录，这里是不是需要嵌套事务？

  

    MPaybill.Update(myTrans, EPaybill);



    myTrans.Commit();

}

catch (Exception e)

{

    bRetVal = false;

    strFailedRetMess = Resources.MESSAGE_TRANS_FAILED;

    myTrans.Rollback();

}

finally

{

    myTrans.Dispose();

    myConn.Close();

}



return bRetVal;

}