using System;

using System.Globalization;

​

public class Program

{

    public static void Main()

    {

        var now = DateTime.Now;

        foreach (CultureInfo c in CultureInfo.GetCultures(CultureTypes.AllCultures))

        {

             Console.WriteLine("{0}: {1}, {2}", c.Name, c.DateTimeFormat.FullDateTimePattern,now.ToString("F",c));

        }

    }

}

​

​