public ExtendedTextCellListview()
 {
     InitializeComponent();
     BindingContext = new ListviewViewModel();
 }
 public TwoColumnCellListview()
 {
     InitializeComponent();
     BindingContext = new ListviewViewModel();
 }
 public Listview()
 {
   InitializeComponent();
   BindingContext = new ListviewViewModel();
 }
 public StackLayoutCell()
 {
   InitializeComponent();
   BindingContext = new ListviewViewModel();
 }