Makes sense! I would not even need the invoice class, I can split after I retrieve.... Thank you so much.

Need to get used to the idea of "explicit operator" also. Looks hot! :)

>Depending on what you need you could use a class for invoice. e.g.

public class Invoice
>    {
>        public static explicit operator Invoice(string fields)
>        {
>            string[] array = fields.Split("\t"[0]).ToArray();
>            var inv = new Invoice();
>            inv.InvoiceNumber = Convert.ToInt32(array[0]);
>            inv.InvoiceDate = Convert.ToDateTime(array[1]);
>            inv.Company = array[2];
>            //etc
>            return inv;
>        }
>        public DateTime InvoiceDate { get; set; }
>        public int InvoiceNumber { get; set; }
>        public decimal Amount { get; set; }
>        public string Company { get; set; }
>    }

Your code could then just be:

IEnumerable<Invoice> invoices = File.ReadAllLines(fileName).Select(s => (Invoice)s);
>//Do whatever