using System;

using System.Collections.Generic;

using System.Linq;

using System.Globalization;

using System.Threading.Tasks;

using System.Reflection;

using System.Text.RegularExpressions;

public class Program

{

    public static void Main(string[] args)

    {

        TimeSpan t = new TimeSpan(12345678);

        var cul = CultureInfo.GetCultureInfo("de");

        Console.WriteLine(t.ToString("g", cul));

    }

}

​

​

​

​

​