protected override void OnAppearing()
{
base.OnAppearing();
AllAthletes = new List <Athlete>(Athletes.Get());
collectionViewAthletes.ItemsSource = AllAthletes;
}
protected override void OnAppearing()
{
base.OnAppearing();
AllAthletes = new List <Athlete>(Athletes.Get());
collectionViewAthletes.ItemsSource = AllAthletes;
}