public void SaveGroupMap(GroupMap groupMap)
        {
            GroupFileName = "groups.xml"; //hardcodé, pas un requis de le spécifier

            // On vérifie si le fichier existe, sinon on le crée
            XDocument xmlDoc;
            if (File.Exists(GroupFileName))
                xmlDoc = XDocument.Load(GroupFileName);
            else
                xmlDoc = new XDocument();
            if (xmlDoc.Descendants("Groups").Elements("Group").Count() == 0)  //Doesn't work??
            {
                //Group section doesn't exist
                XElement newGroup =
                new XElement("Groups",
                    new XElement("Group",
                        new XElement("GroupName", groupMap.GroupName),
                        new XElement("Population", groupMap.Population),
                        new XElement("User", groupMap.User)
                    )
                );
                xmlDoc.Add(newGroup);
                xmlDoc.Save(GroupFileName);
            }
            else //Group section exists
            {
                XElement groups = xmlDoc.Element("Groups");
                XElement newGroup = new XElement("Group",
                    new XElement("GroupName", groupMap.GroupName),
                    new XElement("Population", groupMap.Population),
                    new XElement("User", groupMap.User)
                    );
                groups.Add(newGroup);
                xmlDoc.Save(GroupFileName);
            }

        }
        static void Main(string[] args)
        {
            Console.WriteLine("Welcome to the Starcrafto manager! Input your command:");
            bool wantToQuit = false;
            IXmlManager xmlHandle = new XmlHandler();
            //On attend toujours des options
            while (!wantToQuit)    
            {
                string [] fullCommand = Console.ReadLine().Split(new char[] { ' ' }, StringSplitOptions.RemoveEmptyEntries);  //should capitalize [0]
                if (fullCommand.Length != 0)
                {
                    switch (fullCommand[0])
                    {
                        case "ADD": //Ajout d'un élément vers le XML
                            if (fullCommand.Length == 5)    //Si on a 5 parametres, on ajoute un user
                            {
                                User newUser = new User{ Name = fullCommand[1], Race = fullCommand[2], Pouvoir = fullCommand[3], Itude = fullCommand[4] };
                                
                                xmlHandle.SaveUser(newUser);
                                Console.WriteLine("Command executed: " + fullCommand[0] + " " + fullCommand[1] + " " + fullCommand[2] + " " + fullCommand[3] + " " + fullCommand[4]);
                            }
                            else if (fullCommand.Length == 4)    //Si on a 4 parametres, on ajoute un groupe
                            {
                 
                                GroupMap newGroup = new GroupMap { GroupName = fullCommand[2], Population = fullCommand[1], User = fullCommand[3] };

                                xmlHandle.SaveGroupMap(newGroup);
                                Console.WriteLine("Command executed: " + fullCommand[0] + " " + fullCommand[1] + " " + fullCommand[2] + " " + fullCommand[3] + " ");
                            }
                            else  // Sinon, on a un nb incorrect de param pour ADD
                            {
                                Console.WriteLine("Parametres incorrects!!");
                                break;
                            }
                            break;
                        case "PRINT": //Afficher des infos à l'écran
                            if (fullCommand.Length == 2)
                            {
                                if (fullCommand[1] == "Users")
                                {
                                    List<User> allUsers = xmlHandle.ReadUserList();
                                    foreach(User user in allUsers)
                                    {
                                        Console.WriteLine(user.Name + " " + user.Race + " " + user.Pouvoir + " " + user.Itude + " ");
                                    }
                                }
                                else if (fullCommand[1] == "POPULATION")
                                {

                                }
                            }
                            break;
                        case "EXIT":
                            wantToQuit = true;
                            return;
                        default:
                            Console.WriteLine("Hmm, something happened. Wrong comand");
                            break;
                    }
                }
                
            }
            Console.WriteLine("Press any key to exit.");
            Console.ReadLine();
        }