public ViewBlock(string hostelids, string areaid)
 {
     InitializeComponent();
     hostelids1     = hostelids;
     areaids        = areaid;
     BindingContext = vm = new ViewBlockVM(hostelids, areaid);
 }
 protected override void OnAppearing()
 {
     base.OnAppearing();
     BindingContext = vm = new ViewBlockVM(hostelids1, areaids);
 }