SQL Server 和 Oracle 的 EF 和 TransactionScope 没有升级/跨越到 DTC?

Is it possible to have the following code (in BL) working for both SQL Server and Oracle without escalating/spanning to distributed transactions (DTC) ?

 // dbcontext is created before, same dbcontext will be used by both repositories
 using (var ts = new TransactionScope())
 {
    // create order - make use of dbcontext, possibly to call SaveChanges here
    orderRepository.CreateOrder(order);

    // update inventory - make use of same dbcontext, possibly to call SaveChanges here
    inventoryRepository.UpdateInventory(inventory);

    ts.Complete();
 }

截至今天，即 2013 年 8 月，我知道它适用于 SQL Server 2008+ ......但是 Oracle 呢?我发现这个线程...看起来Oracle正在推广分布式事务，但仍然没有对我来说很清楚.