How to Format a Number for a Specific Culture in C# ?

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Text;
using System.Numerics;
using System.Globalization;
namespace AbundantcodeConsole
{ 
    class Program
    {
        static void Main(string[] args)
        {
           double val = 986432678.8911;
           Console.WriteLine(val.ToString("N",CultureInfo.CreateSpecificCulture("en-US")));
           Console.WriteLine(val.ToString("N",CultureInfo.CreateSpecificCulture("de-DE")));
           Console.ReadLine();
        } 
    }  
}