FieldOrder

Force field order with [FieldOrder] attribute:

//-> You first declare a Record Mapping class:

Input.txt

10248|VINET|04071996|32.38
10249|TOMSP|05071996|11.61
10250|HANAS|08071996|65.83
10251|VICTE|08071996|41.34

RecordClass.cs

[DelimitedRecord("|")]
public class Orders
{
    [FieldOrder(20)]
    public string CustomerID;

    [FieldConverter(ConverterKind.Date, "ddMMyyyy")]
    [FieldOrder(30)]
    public DateTime OrderDate;

    [FieldConverter(ConverterKind.Decimal, ".")] // The decimal separator is "."
    [FieldOrder(40)]
    public decimal Freight;

    [FieldOrder(10)]
    public int OrderID;
}

//-> The FileHelperEngine to process the file:

Example.cs

var engine = new FileHelperEngine<Orders>();
var records = engine.ReadFile("Input.txt");

foreach (var record in records)
{
    Console.WriteLine(record.CustomerID);
    Console.WriteLine(record.OrderDate.ToString("dd/MM/yyyy"));
    Console.WriteLine(record.Freight);
}

Console

VINET
04/07/1996
32,38
TOMSP
05/07/1996
11,61
HANAS
08/07/1996
65,83
VICTE
08/07/1996
41,34