Display.cs

 private ObservableCollection<Schema.Students> Mylist; 

        protected async override void OnNavigatedTo(NavigationEventArgs e)
        {
            //Set the item Source if database exists
            bool check = await Database.DatabaseHelper.Checkdatabase();
            if (check)
            {
                Mylist = Database.DatabaseHelper.GetAllStudents();
                MylistView.ItemsSource = Mylist;
            }
        }

        private void Delete_Button_Click(object sender, RoutedEventArgs e)
        {
            var myobject = (sender as Button).DataContext as Schema.Students;

            //Delete the item
            Database.DatabaseHelper.DeleteStudent(myobject.Id);
            Mylist.Remove(myobject);

        }