using System;

using System.Collections.Generic;

​

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World :) ");

        string[] capacities = {"7999456356", "7999456357"};

        List<string> byteStrings = new List<string>{"7999456356", "7999456357"};

        string formattedString = FormatBytes(byteStrings);

        Console.WriteLine(formattedString);

    }

​

    public static string FormatBytes(List<string> byteStrings)

    {

        string[] units = {"B", "KB", "MB", "GB", "TB"};

        List<string> values = new List<string>();

        foreach (string byteString in byteStrings)

        {

            if (long.TryParse(byteString, out long bytes))

            {

                double value = bytes;

                int unitIndex = 0;

                while (value >= 1000 && unitIndex < units.Length - 1)

                {

                    value /= 1024;

                    unitIndex++;

                }

​

                values.Add(string.Format("{0:F2} {1}", value, units[unitIndex]));

            }

        }

​

        return string.Join(" | ", values);

    }

}