sealed class CSVFileDefinitionMap : CsvClassMap
{
   public CSVFileDefinitionMap()
   {
      Map(m => m.FRM_ID).Name("FARM ID");
      Map(m => m.FRM_OWNER).Name("FARM OWNER ");
   }
}

class CSVFileDefinition
{
    public string FRM_ID { get; set; }
    public string FRM_OWNER { get; set; }
}

using (TextReader reader = File.OpenText(fileName)) {
    var csv = new CsvReader(reader);
    csv.Configuration.RegisterClassMap();
    while (csv.Read()) {
       var record = csv.GetRecord();
    }
}