using System;

using System.Globalization;

public class Program

{

    public static void Main()

    {

        Console.WriteLine(DateTime.UtcNow.ToString(CultureInfo.CreateSpecificCulture("en-US"))); // This is what will be set by default on most of our servers

        Console.WriteLine(DateTime.UtcNow.ToString(CultureInfo.InvariantCulture));

        Console.WriteLine(DateTime.UtcNow.ToString("dd/MM/yyyy")); // An explicitly specified format, rather than using a culture specified one

        Console.WriteLine(DateTime.UtcNow.ToString("O")); // This is the "round-trip" format, which should generally be used when serializing for storage

    }

}