protected override void OnAppearing()
 {
     base.OnAppearing();
     termValue = Term;
     ViewModelTermPage viewModel = new ViewModelTermPage(termValue);
     viewModel.ShowCourses();
 }
		public TermPage (Term term)
		{
			InitializeComponent ();
            termValue = term;
            ViewModelTermPage viewModel = new ViewModelTermPage(term);
            BindingContext = viewModel;

            CourseListView.IsPullToRefreshEnabled = true;
            CourseListView.SetBinding(ListView.IsRefreshingProperty, nameof(viewModel.IsBusy));
		}