Xamarin.Form : Binding item's IsVisible according to ListView selection

BaseViewModel.cs

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq.Expressions;
using System.Runtime.CompilerServices;

namespace BasicListView
{
    public class BaseViewModel : INotifyPropertyChanged
    {
        /*
         * Reference: https://github.com/xamarin/xamarin-forms-book-preview-2/blob/master/Libraries/Xamarin.FormsBook.Toolkit/Xamarin.FormsBook.Toolkit/ViewModelBase.cs
         * 
         */

        public event PropertyChangedEventHandler PropertyChanged;

        protected void OnPropertyChanged([CallerMemberName] string propertyName = null)
        {
            PropertyChangedEventHandler handler = PropertyChanged;
            if(handler != null)
            {
                PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
            }
        }

        protected bool SetField<T>(ref T field, T value, [CallerMemberName] string propertyName = null)
        {
            if (Object.Equals(field, value)) return false;
            field = value;
            OnPropertyChanged(propertyName);
            return true;
        }
    }
}

ItemViewModel.cs

namespace BasicListView.ListViewSelectedItem
{
    public class ItemViewModel : BaseViewModel
    {
        public string Data { get; set; }

        private bool _isSelected;
        public bool IsSelected
        {
            get { return _isSelected; }
            set { SetField(ref _isSelected, value); }
        }
    }
}

MainPage.xaml

<?xml version="1.0" encoding="utf-8" ?>
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
             x:Class="BasicListView.ListViewSelectedItem.MainPage"
             xmlns:local="clr-namespace:BasicListView.ListViewSelectedItem;assembly=BasicListView">
  <ContentPage.BindingContext>
    <local:MainViewModel/>
  </ContentPage.BindingContext>
  <ListView x:Name="listView" ItemsSource="{Binding Data}" SelectedItem="{Binding SelectedItem}">
    <ListView.ItemTemplate>
      <DataTemplate>
        <ViewCell>
          <StackLayout>
            <Label Text="{Binding Data}"/>
            <Label Text="Show only if selected" IsVisible="{Binding IsSelected}"/>
          </StackLayout>
        </ViewCell>
      </DataTemplate>
    </ListView.ItemTemplate>
  </ListView>
</ContentPage>

MainViewModel.cs

using System.Collections.ObjectModel;
using System.Linq;

namespace BasicListView.ListViewSelectedItem
{
    public class MainViewModel : BaseViewModel
    {
        private ObservableCollection<ItemViewModel> _data;
        public ObservableCollection<ItemViewModel> Data
        {
            get { return _data; }
            set { SetField(ref _data, value); }
        }

        private ItemViewModel _selectedItem;
        public ItemViewModel SelectedItem
        {
            get { return _selectedItem; }
            set
            {
                if(_selectedItem != value)
                {
                    if(_selectedItem != null) _selectedItem.IsSelected = false;
                    value.IsSelected = true;
                    _selectedItem = value;
                    OnPropertyChanged();
                }
            }
        }

        public MainVM()
        {
            var query = Enumerable.Range(0, 10)
                             .Select(o => new ItemViewModel
                             {
                                 Data = $"I am item no. {o}"
                             });
            Data = new ObservableCollection<ItemViewModel>(query);
        }
    }
}