void SetUpCollectionView()
		{
			friendsSource = new FriendsSource (viewModel);
			friendsSource.Selected += OnFriendSelected;
			CollectionView.Source = friendsSource;
		}
 void SetUpCollectionView()
 {
     friendsSource           = new FriendsSource(viewModel);
     friendsSource.Selected += OnFriendSelected;
     CollectionView.Source   = friendsSource;
 }