roadie/RoadieLibrary/Extensions/LongExt.cs

using Roadie.Library.Utility;
using System;

namespace Roadie.Library.Extensions
{
    public static class LongExt
    {
        public static string ToFileSize(this long? l)
        {
            if (!l.HasValue)
            {
                return "0";
            }
            return String.Format(new FileSizeFormatProvider(), "{0:fs}", l);
        }
    }
}