using System;

public class Program

{

    public static void Main()

    {

        foreach(var chaine in new string[] {"Je suis remplie", "", null}) {

            var i = string.IsNullOrEmpty(chaine);

            Console.WriteLine($"string.IsNullOrEmpty({(chaine == null ? "null" : "\"" + chaine + "\"")}) = {string.IsNullOrEmpty(chaine)}");

        }

    }

}