Farsi numbers

LocalizeNumbers.cs

using System;
using System.Linq;
using System.Text.RegularExpressions;

namespace Portal.Infrastructure.Extentions
{
    public static class StringExtentions
    {
        private const int ZeroCharCode = '0';
        private const int LocalizedZeroCharCode = '۰';

       
        public static string LocalizeNumbers(this string value)
        {
            if (string.IsNullOrEmpty(value)) return value;

            var chars = value.ToCharArray();
            for (var i = 0; i < chars.Length; i++)
            {
                var num = chars[i] - ZeroCharCode;
                if (0 <= num && num < 10)
                    chars[i] = (char) (LocalizedZeroCharCode + num);
            }
            return new string(chars);
        }

    }
}