public KnowledgeTool()
        {
            InitializeComponent();

            KnowledgesTools = ((KnowledgesViewModel)BindingContext).KnowledgesTools();
            if (KnowledgesTools != null && KnowledgesTools.Count > 0)
            {
                Tools = new GalleryKnowledges(KnowledgesTools).FillGrid(Tools);
            }
            else
            {
                DependencyService.Get <IMessage>().ShortAlert("Aucune connaissance d'outil n'est référencé.");
            }
        }
        public KnowledgeLanguage()
        {
            InitializeComponent();

            KnowledgesLanguages = ((KnowledgesViewModel)BindingContext).KnowledgesLanguages();
            if (KnowledgesLanguages != null && KnowledgesLanguages.Count > 0)
            {
                Languages = new GalleryKnowledges(KnowledgesLanguages).FillGrid(Languages);
            }
            else
            {
                DependencyService.Get <IMessage>().ShortAlert("Aucune connaissance de langage n'est référencé.");
            }
        }