Read and modify a slot field

IRealTimeDatabase database = new RealTimeDatabase();
try
{
    // Open the RTDB.
    if (!database.IsOpen())
{
    database.Open();
}
    // Access the analog table.
    using (IRealTimeTable table = new RealTimeTable("analog"))
    {
        ITableLockRequestType tableLockRequest = new TableLockRequestType();
        // Lock the analog table for writing.
        table.Lock(tableLockRequest.SAFE_WRITE);
       
        // Get the slot field of a record.
        using (IRealTimeRecord record = new RealTimeRecord(table, 28))
        {
            IRecordLockRequestType recordLockRequest = new RecordLockRequestType();
            // Lock the record for writing.
            record.Lock(recordLockRequest.SAFE_WRITE);
            // Modify the record.
            var rtuSlot = record.ReadField<Int32>("rtu");
            record.WriteField<Int32>("rtu", 10);
            Console.WriteLine(
quot;Rtu changed from {rtuSlot} to: {record.ReadField<Int32>("rtu")}");
        } // Leaving scope releases the record lock.
    } // Leaving scope releases the analog table lock.
}
catch (Exception ex)
{
    Console.WriteLine(
quot;An error occurred while reading/writing the slot field: {ex.Message}");
}