Browse the attributes of a field

private void StatusConnectionCallback(BaseMessage response)
{
    switch (response.MessageType)
    {
        case DALMessageType.ConnectionDisconnectedNotification:
            Console.WriteLine("Subscriber:Connection disconnected from the driver.");
            break;
        case DALMessageType.ConnectionEstablishedNotification:
                Console.WriteLine("Subscriber:Connection established with the driver.");
            break;
        case DALMessageType.DataSourceConnectionNotification:
            Console.WriteLine("Subscriber:Connection established with pubsub.");
            waitHandle.Set();
            break;
        case DALMessageType.ConnectionTimeoutNotification:
            Console.WriteLine("Subscriber:Connection timed out.");
            break;
        default:
            Console.WriteLine("Subscriber:Unknown Connection notification: " + response.MessageType.ToString());
            break;
    }
}

private void BrowseAttributeCallback(String leafNodeName, DataSet data, DALPSBrowseStatus browseStatus, DALResponseStatus dalResponseStatus, Object clientObject, String failureReason)
{
    // Handle the output of the data returned by the browse attribute callback method if there are no errors.
    if (browseStatus == DALPSBrowseStatus.Success)
    {              
        foreach (DataRow curRow in data.Tables[0]?.Rows)
        {
            var print = String.Empty;
            foreach (object field in curRow.ItemArray)
            {
                print += field + " ";
            }
            Console.WriteLine(print);
        }
    }
    else
    {
        Console.WriteLine("BrowseAttributeCallback: Failed to browse attribute due to " + failureReason);
    }
    // Set the state of the event to signaled after processing the browse attribute callback.
    waitHandle.Set();
}

public void BrowseAttributes()
{
    try
    {
        // Verify that DAL service has initialized.
        if (DALService.IsInitialized == false)
        {
            DALService.Initialize();
        }
        var statusConnectionDelegate = new DALConnectionStatusCallBackMethod(StatusConnectionCallback);
        var browseAttributeDelegate = new DALPSConnection.DALPSBrowseAttributeDelegate(BrowseAttributeCallback);
        // Get the global connection.
        var psSubConn = DALPSClient.GetGlobalConnection("common", statusConnectionDelegate);
        // Block the current thread until the current instance receives a signal or the timeout expires.
        waitHandle.WaitOne(TimeSpan.FromSeconds(10));
               
        if (psSubConn.IsConnected)
        {
            var topic = "analog.AutoCommandAnalog01.curspt";
            // Reset the global AutoResetEvent waitHandle variable.
            waitHandle = new AutoResetEvent(false);
            // Browse the topic attributes information in the RTDB.
            psSubConn.BrowseAttributes(topic, browseAttributeDelegate, this);
            // Block the current thread until the current instance receives a signal or the timeout expires.
            waitHandle.WaitOne(TimeSpan.FromSeconds(10));
        }
    }
    catch (Exception e)
    {
        Console.WriteLine("Error:" + e.Message);
    }
}