edjournal/Credits.cs

using System.Globalization;

namespace EDJournal {
    public class Credits {
        public static string FormatCredits(int amount) {
            return FormatCredits((long)amount);
        }

        public static string FormatCredits(long amount) {
            var format = new CultureInfo(CultureInfo.CurrentCulture.Name, true).NumberFormat;
            format.NumberGroupSeparator = ",";
            format.NumberDecimalSeparator = ".";
            format.NumberGroupSizes = new int[1] { 3 };
            format.NumberDecimalDigits = 0;
            if (amount > 0 && (amount % 1000000000) == 0) {
                amount /= 1000000000;
                return string.Format("{0}M CR", amount.ToString("N", format));
            } else if (amount > 0 && (amount % 1000000) == 0) {
                amount /= 1000000;
                return string.Format("{0}M CR", amount.ToString("N", format));
            } else if (amount > 0 && (amount % 100000) == 0) {
                double am = ((double)amount) / 1000000;
                format.NumberDecimalDigits = 1;
                return string.Format("{0}M CR", am.ToString("N", format));
            } else if (amount > 0 && (amount % 1000) == 0) {
                amount /= 1000;
                return string.Format("{0}K CR", amount.ToString("N", format));
            }

            return string.Format("{0} CR", amount.ToString("N", format));
        }
    }
}