StrangeTools/QVCopier/Utility/TextFormatter.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace QVCopier.Utility
{
    public static class TextFormatter
    {
        public static string ToFriendFileSize(this long value)
        {
            string[] sizes = { "B", "KB", "MB", "GB", "TB" };
            double len = value;
            var order = 0;

            while (len >= 1024 && order < sizes.Length - 1)
            {
                order++;
                len = len / 1024;
            }

            // Adjust the format string to your preferences. For example "{0:0.#}{1}" would
            // show a single decimal place, and no space.
            var result = $"{len:0.##} {sizes[order]}";

            return result;
        }
    }
}