问dev上的TransactionScope超时连接

EN

private static void Delete(int PaxID)
    {
        using (SqlConnection conn = DataHelper.GetDBConnection())
        {
            using (SqlCommand cmd = DataHelper.GetSPCommand("spDeletePax",conn))
            {
                cmd.Parameters.AddWithValue("@PaxID", PaxID);
                cmd.ExecuteNonQuery();
            }
        }
    }

    public static void DeletePaxes(List<int> ids, string bookingRef, string user)
    {
        using (TransactionScope ts = new DataHelper.CreateTransactionScope())
        {
            foreach (var i in ids)
            {
                Delete(i);
            }
            ts.Complete();
        }
    }

    public static SqlConnection GetDBConnection()
    {
        SqlConnection conn = new SqlConnection(System.Configuration.ConfigurationManager.ConnectionStrings["DB"].ConnectionString);
        conn.Open();
        return conn;
    }

    public static TransactionScope CreateTransactionScope()
    {
        var transactionOptions = new TransactionOptions();
        transactionOptions.IsolationLevel = System.Transactions.IsolationLevel.ReadCommitted;
        transactionOptions.Timeout = TransactionManager.MaximumTimeout;
        return new TransactionScope(TransactionScopeOption.Required, transactionOptions);
    }