using System;

using System.Globalization;

using System.Text;

​

public static class Program

{

    public static void Main()

    {

        var passengers = new[]

        {

            new Passenger { FirstName = "Richard", LastName = "Riddick", Nationality = "HU", BookingPassengerId = 1 }

        };

        var paymentEntries = new[]

        {

            new PaymentEntry { RefundCurrency = "HUF", FeeCode = "EUREG", RefundAmount = 7072m, ExchangeRate = 400m },

            new PaymentEntry { RefundCurrency = "EUR", FeeCode = "AAF", RefundAmount = 50m, ExchangeRate = 1m }

        };

        Console.WriteLine(Do(passengers, paymentEntries));

    }

    public static string Do(Passenger[] claimPaymentPassengers, PaymentEntry[] paymentEntries)

    {

        var sb = new StringBuilder();

​

        sb.AppendLine(CultureInfo.InvariantCulture, $"Comment: BenificiaryName");

​

        foreach (var pax in claimPaymentPassengers)

        {

            foreach (var p in paymentEntries)

            {

                var passengerCount = claimPaymentPassengers.Length;

​

                if (p.FeeCode == "AAF")

                {

                    passengerCount = claimPaymentPassengers.Length;

                }

​

                var nationality = !string.IsNullOrWhiteSpace(pax.Nationality) ? $" ({pax.Nationality}) " : " ";

​

                var useEur = false;

                var amount = (p.RefundAmount / passengerCount) / (useEur ? p.ExchangeRate : 1m);

                var currency = useEur ? "€" : p.RefundCurrency;

​

                sb.AppendLine(CultureInfo.InvariantCulture, $"{pax.FirstName} {pax.LastName}{nationality}{pax.BookingPassengerId}");

                sb.AppendLine(CultureInfo.InvariantCulture, $"{amount.Round():0.##} {currency} ({p.FeeCode})");

            }

        }

​

        sb.AppendLine(CultureInfo.InvariantCulture, $"W6 2201 20122024");

        return sb.ToString();

    }

    public static decimal Round(this decimal d)

    {

        return Math.Round(d, 2, MidpointRounding.AwayFromZero);

    }

    public class Passenger

    {

        public long BookingPassengerId {get;set;}       

        public string Nationality {get;set;}    

        public string FirstName {get;set;}

        public string LastName {get;set;}

    }

    public class PaymentEntry

    {

        public string RefundCurrency {get;set;}     

        public string FeeCode {get;set;}

        public decimal RefundAmount {get;set;}

        public decimal ExchangeRate {get;set;}

​

    }

}