Xamarin Forms Custom SearchHandler

GPlayMusicSearchHandler.cs

public class GPlayMusicSearchHandler : SearchHandler
{
    public GPlayMusicSearchHandler()
    {
    }

    protected override void OnQueryChanged(string oldValue, string newValue)
    {
        base.OnQueryChanged(oldValue, newValue);

        if (string.IsNullOrWhiteSpace(newValue))
        {
            ItemsSource = Artists.OrderBy(item => item.Name);
        }
        else
        {
            ItemsSource = Artists.Where(item => item.Name.ToLower().Contains(newValue.ToLower())).OrderBy(item => item.Name).ToList<Artist>();
        }
    }

    protected override void OnItemSelected(object item)
    {
        base.OnItemSelected(item);
        //YOUR LOGIC
    }
}

MyPage.xaml

<ContentPage>
    <Shell.SearchHandler>
        <services:GPlayMusicSearchHandler Placeholder="Search music"
                                          ShowsResults="true"
                                          SearchBoxVisibility="Collapsible"
                                          CancelButtonColor="Black"
                                          TextColor="Black"
                                          DisplayMemberName="Name">
            <services:GPlayMusicSearchHandler.ItemTemplate>
                <DataTemplate>
                    <views:ArtistSearchItemView />
                </DataTemplate>
            </services:GPlayMusicSearchHandler.ItemTemplate>
        </services:GPlayMusicSearchHandler>
    </Shell.SearchHandler>
    <ContentPage.Content>
    </ContentPage.Content>
</ContentPage>