using System;

​

using System.Collections.Generic; 

public class Program

{

    public static void Main()

    {

            Console.Write("HumanReadableTimeSpan ran for "); 

            Console.WriteLine(ToHumanReadableTimeSpan(1234567)); 

​

    }

    public static string ToHumanReadableTimeSpan(long milliseconds)

    {

        if (milliseconds == 0) return "0ms";

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

        //Fri 22-Sep-17 3:40pm metadataconsulting.blogspot.com - added formating 

        Action<int, string, int> add = (val, displayunit, zeroplaceholder) => { if (val > 0) tsparts.Add(string.Format("{0:DL}X".Replace("X", displayunit).Replace("L",zeroplaceholder.ToString()), val)); };

        //Action<int, string> add = (val, unit) => { if (val > 0) tsparts.Add(string.Format("{0:D1}X".Replace("X", unit), val)); };

        //Action<int, string> add = (val, unit) => { if (val > 0) tsparts.Add(val+unit); };

        TimeSpan t = TimeSpan.FromMilliseconds(milliseconds);

        add(t.Days, "d", 1);

        add(t.Hours, "h",  1);

        add(t.Minutes, "m", 1);

        add(t.Seconds, "s", 1);

        add(t.Milliseconds, "ms",3);

        return string.Join(" ", tsparts);

    }

}