maxTimeout如果machine.config中没有“system.transactions”元素，则machine.config中的默认值是多少（请参见示例）？

<system.transactions>
   <machineSettings maxTimeout="??:??:??" />
</system.transactions>

我之所以这样问是因为代码由于以下异常而崩溃，并且看来与超时有关的事务有关，在SaveChanges方法期间崩溃，而我收到的异常如下：

The transaction associated with the current connection has completed
but has not been disposed. The transaction must be disposed before
the connection can be used to execute SQL statements.

这是崩溃的代码：

using (TransactionScope transaction = TransactionHelper.CreateTransactionScope())
{
    using (EFContext efDBContext = new EFContext())
    {
        try
        {
            efDBContext.Connection.Open();

            foreach (MyEntity currentEntity in myEntities)
            {
                //Insertion
            }

            transaction.Complete();
        }
        catch (Exception ex)
        {
            //Inspect current entity
            //Get Total Time of the run
            //Number of entities processed
        }
        finally
        {
            if (esfDBContext.Connection.State == ConnectionState.Open)
                esfDBContext.Connection.Close();
        }
    }
}

这就是我创建的方式TransactionScope：

public static TransactionScope CreateTransactionScope(TransactionScopeOption option = TransactionScopeOption.Required, IsolationLevel isolationLevel = IsolationLevel.ReadCommitted)
{
    var transactionOptions = new TransactionOptions()
    {
        Timeout = TimeSpan.MaxValue,
        IsolationLevel = isolationLevel
    };

    return new TransactionScope(option, transactionOptions);
}