Opc.Ua.Server.ServerUtils.EmptyQueue C# (CSharp) Method

        public static DataSet EmptyQueue(DataSet dataset)
        {
            if (dataset == null)
            {
                dataset = new DataSet();
                dataset.Tables.Add("MonitoredItems");

                dataset.Tables[0].Columns.Add("Id", typeof(uint));
                dataset.Tables[0].Columns.Add("Timestamp", typeof(string));
                dataset.Tables[0].Columns.Add("EventType", typeof(string));
                dataset.Tables[0].Columns.Add("NodeId", typeof(NodeId));
                dataset.Tables[0].Columns.Add("MonitoringMode", typeof(MonitoringMode));
                dataset.Tables[0].Columns.Add("SamplingInterval", typeof(double));
                dataset.Tables[0].Columns.Add("QueueSize", typeof(uint));
                dataset.Tables[0].Columns.Add("DiscardOldest", typeof(bool));
                dataset.Tables[0].Columns.Add("Filter", typeof(string));
                dataset.Tables[0].Columns.Add("Value", typeof(Variant));
                dataset.Tables[0].Columns.Add("StatusCode", typeof(StatusCode));
                dataset.Tables[0].Columns.Add("SourceTimestamp", typeof(string));
                dataset.Tables[0].Columns.Add("ServerTimestamp", typeof(string));

                dataset.Tables[0].DefaultView.Sort = "Timestamp";
            }

            lock (m_events)
            {
                while (m_events.Count > 0)
                {
                    Event e = m_events.Dequeue();

                    DataRow row = dataset.Tables[0].NewRow();

                    row[0] = e.ServerHandle;
                    row[1] = e.Timestamp.ToLocalTime().ToString("HH:mm:ss.ffffff");
                    row[2] = e.EventType.ToString();
                    row[3] = e.NodeId;

                    if (e.Parameters != null)
                    {
                        row[4] = e.MonitoringMode;
                        row[5] = e.Parameters.SamplingInterval;
                        row[6] = e.Parameters.QueueSize;
                        row[7] = e.Parameters.DiscardOldest;

                        if (e.Parameters.Filter != null)
                        {
                            row[8] = e.Parameters.Filter.ToString();
                        }
                    }

                    if (e.Value != null)
                    {
                        row[9]  = e.Value.WrappedValue;
                        row[10] = e.Value.StatusCode;
                        row[11] = e.Value.ServerTimestamp.ToLocalTime().ToString("HH:mm:ss.fff");
                        row[12] = e.Value.ServerTimestamp.ToLocalTime().ToString("HH:mm:ss.fff");
                    }

                    dataset.Tables[0].Rows.Add(row);
                }
            }

            dataset.AcceptChanges();
            return dataset;
        }