//public static string Invariant(FormattableString s) => // s.ToString(CultureInfo.InvariantCulture); public static void ShowDetails(FormattableString s) { WriteLine($"argument count: {s.ArgumentCount}"); WriteLine($"format: {s.Format}"); for (int i = 0; i < s.ArgumentCount; i++) { WriteLine($"Argument {i}: {s.GetArgument(i)}"); } }