using System;

using System.Globalization;

using System.Threading;

public class Program

{

    public static void Main()

    {

        // Nada to start with.      

        Print(CultureInfo.CurrentCulture);

        // US.

        var culture = CultureInfo.CreateSpecificCulture("en-US");

        Thread.CurrentThread.CurrentCulture = culture;

        Thread.CurrentThread.CurrentUICulture = culture;        

        Print(CultureInfo.CurrentCulture);

        // NZ.

        culture = CultureInfo.CreateSpecificCulture("en-NZ");

        Thread.CurrentThread.CurrentCulture = culture;

        Thread.CurrentThread.CurrentUICulture = culture;        

        Print(CultureInfo.CurrentCulture);

        // Invariant

        Print(CultureInfo.InvariantCulture);

    }

    private static void Print(CultureInfo culture)

    {

        Console.WriteLine($"culture: {culture.Name}");

        const string s1 = "27/03/2024";

        const string s2 = "            27/03/2024";

        const string f = "dd/MM/yyyy";

        Console.WriteLine($"            '{s1}' > '{DateTime.ParseExact(s1, f, culture)}'");

        //Console.WriteLine($"'{s2}' > '{DateTime.ParseExact(s2, f, culture)}'"); // Fails

        Console.WriteLine($"'{s2}' > '{DateTime.ParseExact(s1, f, culture, DateTimeStyles.AllowWhiteSpaces)}'");

    }

}