What happens if I call `Console.Error.WriteLine` when the standard error stream is not available or has been closed?

If the standard error stream is unavailable (e.g., closed or redirected to null), calling `Console.Error.WriteLine` might result in an `IOException` or a `NullReferenceException`. It's generally a good practice to check if `Console.IsErrorRedirected` is false before using `Console.Error.WriteLine` to avoid potential errors. You should also handle any potential exceptions that may arise.