using System;

public class Program

{

    public static void Main()

    {

        var msString = "13414,4658".Replace(',', '.');

        Console.WriteLine("Aantal miliseconden: " + msString + "ms");

        TimeSpan t = TimeSpan.FromMilliseconds(double.Parse(msString));

        string answer = string.Format("{0:D2}h:{1:D2}m:{2:D2}s:{3:D3}ms", 

                        t.Hours, 

                        t.Minutes, 

                        t.Seconds, 

                        t.Milliseconds);

        Console.WriteLine("Leesbaar: " + answer);

    }

}