private void RecordingButton(object sender, RoutedEventArgs e)
        {
            using (MyDbContext db = new MyDbContext())
            {
                User    thisUser = db.Users.Find(App.CurrentUser.Id);
                MedCard a        = new MedCard();
                a = db.MedCards.Where(b => b.BDay != null && b.ID == thisUser.Id).FirstOrDefault();
                if (a != null)
                {
                    if (ButtonCloseMenu.Visibility == Visibility.Visible)
                    {
                        ButtonOpenMenu.Visibility  = Visibility.Visible;
                        ButtonCloseMenu.Visibility = Visibility.Collapsed;

                        //GridMain.Children.Clear();
                        GridMain.Children.Add(new RecordingWindow(this));
                    }
                    else
                    {
                        //GridMain.Children.Clear();
                        GridMain.Children.Add(new RecordingWindow(this));
                    }
                }
                else
                {
                    MaterialMessageBox.Show("Заполните личную карточку, чтобы записаться к врачу", "Уведомление");
                    if (ButtonCloseMenu.Visibility == Visibility.Visible)
                    {
                        ButtonOpenMenu.Visibility  = Visibility.Visible;
                        ButtonCloseMenu.Visibility = Visibility.Collapsed;
                    }
                }
            }
        }
        private void HistoryButton(object sender, RoutedEventArgs e)
        {
            using (MyDbContext db = new MyDbContext())
            {
                User    thisUser = db.Users.Find(App.CurrentUser.Id);
                MedCard a        = new MedCard();
                a = db.MedCards.Where(b => b.BDay != null && b.ID == thisUser.Id).FirstOrDefault();
                if (a != null)
                {
                    if (ButtonCloseMenu.Visibility == Visibility.Visible)
                    {
                        ButtonOpenMenu.Visibility  = Visibility.Visible;
                        ButtonCloseMenu.Visibility = Visibility.Collapsed;

                        //GridMain.Children.Clear();
                        GridMain.Children.Add(new HistotyVisitingWindow(this));
                    }
                    else
                    {
                        //GridMain.Children.Clear();
                        GridMain.Children.Add(new HistotyVisitingWindow(this));
                    }
                }
                else
                {
                    MaterialMessageBox.Show("У вас не может быть истории посещений, т.к. вы не заполнили личную карточку ", "Уведомление");
                    if (ButtonCloseMenu.Visibility == Visibility.Visible)
                    {
                        ButtonOpenMenu.Visibility  = Visibility.Visible;
                        ButtonCloseMenu.Visibility = Visibility.Collapsed;
                    }
                }
            }
        }