i have a list of multiple objects that I want to write into an excel sheet. I create a folder and filename, following the path and the writer:

string path = Path.Combine(folder, fileName);

var config = new CsvConfiguration(CultureInfo.InvariantCulture)
{
    HasHeaderRecord = true
};
using (var writer = new StreamWriter(path))
using (var csv = new CsvWriter(writer, config))
{
    csv.WriteRecords(outputYearlyResult);
}

It does write to an excel sheet, also with the data I want. However, it adds a lot more columns than parameters in OptResultYear. The columns are not strange, they are from another database, but I don’t know how they could enter here? I’ve checked and the dictionaries only contain the parameters that I filled in and nothing more.

How do I reduce the columns it prints?

Please note, that the excel sheet is furthermore exactly as I expected, just with additional columns.