private void SzukajButton_Click(object sender, RoutedEventArgs e)
        {
            using (ImieninyContext ctx = new ImieninyContext(ImieninyContext.ConnectionString))
            {
                ctx.CreateIfNotExists();

                DodajList.ItemsSource = ctx.Tabela.Where(d => d.Znajomy == "Collapsed").Where(d => d.Imieniny == Szukane.Text).OrderBy(d => d.Imieniny).ToList();
            }
        }
        protected override void OnNavigatedTo(NavigationEventArgs e)
        {
            using (ImieninyContext ctx = new ImieninyContext(ImieninyContext.ConnectionString))
            {
                ctx.CreateIfNotExists();

                DodajList.ItemsSource = ctx.Tabela.Where(d => d.Znajomy == "Visible").ToList();

            }
        }
        protected override void OnNavigatedTo(NavigationEventArgs e)
        {
            using (ImieninyContext ctx = new ImieninyContext(ImieninyContext.ConnectionString))
            {
                ctx.CreateIfNotExists();

                MainLongListSelector.ItemsSource = ctx.Tabela.Where(d => d.Dzien == DateTime.Today.Day).Where(d => d.Miesiac == DateTime.Today.Month).ToList();

                JutroList.ItemsSource = ctx.Tabela.Where(d => d.Dzien == DateTime.Today.AddDays(1).Day).Where(d => d.Miesiac == DateTime.Today.AddDays(1).Month).ToList();

                ZnajomiList.ItemsSource = ctx.Tabela.Where(d => d.Znajomy == "Visible").ToList();

            }
        }