using System;

using System.Globalization;

public class Program

{

    public static void Main()

    {

        var currentCulture = CultureInfo.CurrentCulture;

        Console.WriteLine(nameof(CultureInfo.CurrentCulture) + " is " + (currentCulture.IsReadOnly ? "readonly" : "not readonly"));

        var currentUiCulture = CultureInfo.CurrentUICulture;

        Console.WriteLine(nameof(CultureInfo.CurrentUICulture) + " is " + (currentUiCulture.IsReadOnly ? "readonly" : "not readonly"));

    }

}