interpolation (C# Shell App Paste)

//Disclaimer: The creator of 'C# Shell (C# Offline Compiler)' is in no way responsible for the code posted by any user.
using System;
using System.IO;
using System.Linq;
using System.Collections.Generic;
using System.Globalization;

namespace CSharp_Shell
{

    public static class Program
    {
        public static void Main()
        {
           double balance = 123.45;
           string message = $"us balance: {balance:C}";
           FormattableString message2 = $"us balance 2: {balance:C}";
           CultureInfo provider = new CultureInfo("en-US");
           Console.WriteLine(message.ToString(provider));
           Console.WriteLine(message2.ToString(provider));
           Console.ReadLine();
        }
    }
}