C＃System.InvalidOperationException：当前的TransactionScope已经完成

我在执行源代码时遇到此错误 . 但似乎我无法在互联网上获得太多信息 . 因此，我希望可以从这里的专业人士那里获得一些线索 .

源代码

public List<string> GetData (List<long> Id)
{
    List<string> data;
    string sql = "select * from tblSample with(nolock) where SampleId in @sampleId";
    Dapper.DynamicParameters param = new Dapper.DynamicParameters();
    param.Add("@sampleId", Id);

    try
    {
        data = this.queryrunner.QueryList(sql, param);
    }
    catch (Exception ex)
    {
        logger.Error(ex.Message, ex);
    }

    return data;
}

QueryRunner类方法

private void OpenConnection()
    {
        if (this.conn.State != ConnectionState.Open)
        {
            this.conn.Open();
        }
    }

    public List<t> QueryList(String sql, DynamicParameters param)
    {
        List<t> t;

        try
        {
            OpenConnection();
            t = this.conn.Query<t>(sql, param).ToList();
        }
        catch (System.Data.SqlClient.SqlException ex)
        {
            logger.Debug(ex.Message, ex);
            LogSqlErrorException(this.conn.Database, sql, param);
            throw;
        }
        finally
        {
            CloseConnection();
        }

        return t;
    }

以下是错误日志的一部分： -

System.InvalidOperationException：当前的TransactionScope已经完成 . 在System.Data.ProviderBase.DbConnectionPool.GetFromTransactedPool（事务和事务）的System.Transactions.Transaction.get_Current（）处于System.Data.ProviderBase.DbConnectionPool.TryGetConnection（DbConnection owningObject，UInt32 waitForMultipleObjectsTimeout，Boolean allowCreate，Boolean onlyOneCheckConnection，DbConnectionOptions userOptions，在System.Data.ProviderBase.DbConnectionFactory.TryGetConnection的System.Data.ProviderBase.DbConnectionPool.TryGetConnection（DbConnection owningObject，TaskCompletionSource1 retry，DbConnectionOptions userOptions，DbConnectionInternal＆connection）上的DbConnectionInternal＆connection）（DbConnection owningConnection，TaskCompletionSource1 retry，DbConnectionOptions userOptions，DbConnectionInternal oldConnection，DbConnectionInternal＆ System.Data.ProviderBase.DbConnectionInternal.TryOpenConnectionInternal（DbConnection outerConnection，DbConnectionFactory connectionFactory，TaskCompletionSource1 retry，DbConnectionOptions userO）在System.Data.SqlClient.SqlConnection.TryOpen的System.Data.SqlClient.SqlConnection.TryOpenInner（TaskCompletionSource1 retry）处的System.Data.ProviderBase.DbConnectionClosed.TryOpenConnection（DbConnection outerConnection，DbConnectionFactory connectionFactory，TaskCompletionSource1 retry，DbConnectionOptions userOptions）处于（） . System.Data.SqlClient.SqlConnection.Open（）中的TaskCompletionSource1重试）