private void Button_second_Click(object sender, RoutedEventArgs e)
        {
            this.Button_first.Background = new SolidColorBrush(Color.FromRgb(67, 67, 67));
            this.Button_first.Foreground = new SolidColorBrush(Color.FromRgb(222, 222, 222));

            this.Button_second.Background = new SolidColorBrush(Color.FromRgb(222, 222, 222));
            this.Button_second.Foreground = new SolidColorBrush(Color.FromRgb(254, 95, 27));

            this.Button_third.Background = new SolidColorBrush(Color.FromRgb(67, 67, 67));
            this.Button_third.Foreground = new SolidColorBrush(Color.FromRgb(222, 222, 222));

            this.Button_four.Background = new SolidColorBrush(Color.FromRgb(67, 67, 67));
            this.Button_four.Foreground = new SolidColorBrush(Color.FromRgb(222, 222, 222));

            var panel = new StackPanel();

            using (TrainingContext db = new TrainingContext())
            {
                db.Trainings.Load();
                var list = db.Trainings.Local.ToBindingList();
                foreach (var item in list)
                {
                    if (item.Groupe == 2 && item.ID_type == 0)
                    {
                        var a = new TrainBlock(item, user);
                        panel.Children.Add(a);
                    }
                }
            }
            this.List_train.Content = panel;
        }
        public All_train(User us)
        {
            user = us;
            InitializeComponent();
            var panel = new StackPanel();

            using (TrainingContext db = new TrainingContext())
            {
                db.Trainings.Load();
                var list = db.Trainings.Local.ToBindingList();
                foreach (var item in list)
                {
                    if (item.ID_type == 0)
                    {
                        var a = new TrainBlock(item, us);
                        panel.Children.Add(a);
                    }
                }
                this.List_train.Content = panel;
            }
        }