System.Dynamic.ExpandoObject' doesnt contain a definition for 'xxxxxx'

[7cod]

Im trying to read and get data from a .csv file but i always receive the error message "System.Dynamic.ExpandoObject' doesnt contain a definition for 'xxxxxx' " when i try to to read the record.

public void Process()
{
using (StreamReader input = File.OpenText(InputfilePath))
using (CsvReader csvReader = new CsvReader(input, CultureInfo.InvariantCulture))
{
csvReader.Read();
IEnumerable records = csvReader.GetRecords();

            csvReader.Configuration.TrimOptions = CsvHelper.Configuration.TrimOptions.Trim;
            csvReader.Configuration.Comment = '@';
            csvReader.Configuration.Delimiter = ",";
            csvReader.Configuration.HasHeaderRecord = true;

            try
            {
                foreach (var record in records)
                {
                    Console.WriteLine(record.OrderNum);
                    Console.WriteLine(record.CustomerNum);
                    Console.WriteLine(record.Desc);
                    Console.WriteLine(record.Precip); 
                }
            }
            catch (Exception e)
            {
                Console.WriteLine(e.Message.ToString());
            }
  
        }
    }

My csv file contains the next data:

OrderNum,CustomerNum,Desc,Precip
42, 5, 62, 10
43, 6, 63, 85
44, 7, 64, 86