using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

        Console.WriteLine(string.Format("{0} -> {1}", "Root", ReadableFileSize_PieChart(1171566)));

        Console.WriteLine(string.Format("{0} -> {1}", "2017", ReadableFileSize_PieChart(2366800)));

        Console.WriteLine(string.Format("{0} -> {1}", "2016", ReadableFileSize_PieChart(11845834)));

        Console.WriteLine(string.Format("{0} -> {1}", "Recycle bin", ReadableFileSize_PieChart(1171566)));

        Console.WriteLine(string.Format("{0} -> {1}", "Total", ReadableFileSize_PieChart(1171566 + 2366800 + 11845834 + 1171566)));

    }

    private static decimal ReadableFileSize_PieChart(long size)

        {

            decimal s = size;

            int order = 0;

            while (order < 2)

            {

                order++;

                s = s / 1024;

            }

​

            return Math.Round(s, 2);

        }

    private string ReadableFileSize(long size)

        {

            decimal s = size;

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

            int order = 0;

            while (s >= 1024 && order + 1 < sizes.Length)

            {

                order++;

                s = s / 1024;

            }

​

                return string.Format("{0:0.##} {1}", s, sizes[order]);

​

        }

}