Как обмениваться данными между страницами при использовании фрейма по MVVM

У меня есть простое приложение с фреймом в MainPage.xaml, который переключается между MediaCenterPage.xaml и PlayerPage.xaml. Теперь я хочу, чтобы выбранный фильм в MediaCenter был доступен на PlayerPage. Если я использую привязку и ссылаюсь на модель, это, конечно, два разных экземпляра объекта. Каков правильный подход к обмену данными между страницами?

MainPage.xaml

<Page
    x:Class = "WinUI3Demo.Pages.MediaCenter.MainPage"
    xmlns = "http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x = "http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:d = "http://schemas.microsoft.com/expression/blend/2008"
    xmlns:local = "using:WinUI3Demo.Pages.MediaCenter"
    xmlns:mc = "http://schemas.openxmlformats.org/markup-compatibility/2006"
    Background = "{ThemeResource ApplicationPageBackgroundThemeBrush}"
    mc:Ignorable = "d" />

MainPage.xaml.cs

namespace WinUI3Demo.Pages.MediaCenter
{
    /// <summary>
    /// An empty page that can be used on its own or navigated to within a Frame.
    /// </summary>
    public sealed partial class MainPage : Page
    {
        public static Frame MainFrame = new();
      
        public MainPage()
        {
            this.InitializeComponent();
            MainFrame.Navigate(typeof(MediaCenterPage));
            this.Content = MainFrame;
        }
    }
}

Медиацентрпаже.xaml

<?xml version = "1.0" encoding = "utf-8" ?>
<Page
    x:Class = "WinUI3Demo.Pages.MediaCenter.MediaCenterPage"
    xmlns = "http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x = "http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:d = "http://schemas.microsoft.com/expression/blend/2008"
    xmlns:local = "using:WinUI3Demo.Pages"
    xmlns:mc = "http://schemas.openxmlformats.org/markup-compatibility/2006"
    xmlns:models = "using:WinUI3Demo.ViewModels"
    Background = "{ThemeResource ApplicationPageBackgroundThemeBrush}"
    mc:Ignorable = "d">
    <Page.DataContext>
        <models:MediaModel x:Name = "Model" />
    </Page.DataContext>
    <Grid Padding = "16">
        <Grid.RowDefinitions>
            <RowDefinition Height = "*" />
            <RowDefinition Height = "Auto" />
        </Grid.RowDefinitions>
        <Grid Grid.Row = "0">
            <Grid.RowDefinitions>
                <RowDefinition Height = "10*" />
                <RowDefinition Height = "1*" />
                <RowDefinition Height = "1*" />
            </Grid.RowDefinitions>
            <Viewbox Grid.Row = "1" HorizontalAlignment = "Left">
                <TextBlock x:Name = "HeaderTextBlock" FontWeight = "ExtraBold" />
            </Viewbox>
            <Viewbox
                Grid.Row = "0"
                Margin = "0,15,0,0"
                HorizontalAlignment = "Center"
                VerticalAlignment = "Center"
                Stretch = "UniformToFill">
                <MediaPlayerElement
                    x:Name = "MediaPlayer"
                    AreTransportControlsEnabled = "False"
                    AutoPlay = "True"
                    Source = "{x:Bind models:Selected, Mode=OneWay}" />
            </Viewbox>
            <Viewbox Grid.Row = "2" HorizontalAlignment = "Left">
                <TextBlock
                    x:Name = "ContentTextBlock"
                    Width = "880"
                    TextWrapping = "WrapWholeWords" />
            </Viewbox>
        </Grid>
        <ScrollView
            Grid.Row = "1"
            Height = "250"
            Padding = "0,10,0,0"
            ContentOrientation = "Horizontal">
            <ItemsView
                x:Name = "MediaCenterItemView"
                ItemsSource = "{x:Bind Model.Objects, Mode=OneWay}"
                PointerPressed = "MediaCenterItemView_PointerPressed"
                SelectionChanged = "ItemsView_SelectionChanged">
                <ItemsView.Layout>
                    <LinedFlowLayout
                        ItemsStretch = "Fill"
                        LineHeight = "250"
                        MinItemSpacing = "15" />
                </ItemsView.Layout>
                <ItemsView.ItemTemplate>
                    <DataTemplate x:DataType = "models:MediaObject">
                        <ItemContainer>
                            <Grid>
                                <Image Source = "{x:Bind Thumbnail, Mode=OneWay}" Stretch = "Uniform" />
                            </Grid>
                        </ItemContainer>
                    </DataTemplate>
                </ItemsView.ItemTemplate>
            </ItemsView>
        </ScrollView>
    </Grid>
</Page>

Медиацентрпаже.xaml.cs

namespace WinUI3Demo.Pages.MediaCenter
{

    public sealed partial class MediaCenterPage : Page
    {
        public static MediaObject SelectedMovie;
        public MediaCenterPage()
        {
         
            this.InitializeComponent();
        }

        private void ItemsView_SelectionChanged(ItemsView sender, ItemsViewSelectionChangedEventArgs args)
        {
            if (MediaCenterItemView.SelectedItem != null)
            {
                var selectedMovie = MediaCenterItemView.SelectedItem as MediaObject;
                HeaderTextBlock.Text = selectedMovie.Title;
                ContentTextBlock.Text = selectedMovie.Description;
            }

        }

        private void MediaCenterItemView_PointerPressed(object sender, PointerRoutedEventArgs e)
        {
            if (MediaCenterItemView.SelectedItem != null)
            {
                Frame.Navigate(typeof(PlayerPage));
            }
        }
    }
}

PlayerPage.xaml

<?xml version = "1.0" encoding = "utf-8" ?>
<Page
    x:Class = "WinUI3Demo.Pages.MediaCenter.PlayerPage"
    xmlns = "http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x = "http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:d = "http://schemas.microsoft.com/expression/blend/2008"
    xmlns:local = "using:WinUI3Demo.Pages"
    xmlns:mc = "http://schemas.openxmlformats.org/markup-compatibility/2006"
    xmlns:models = "using:WinUI3Demo.ViewModels"
    Background = "{ThemeResource ApplicationPageBackgroundThemeBrush}"
    mc:Ignorable = "d">
    <Page.DataContext>
        <models:MediaModel x:Name = "Model" />
    </Page.DataContext>
    <Grid>
        <StackPanel>
            <AppBarButton Click = "BackButton_Click" Label = "Back" />
            <Grid>
                <MediaPlayerElement
                    x:Name = "MediaPlayer"
                    AreTransportControlsEnabled = "True"
                    AutoPlay = "True"
                    Source = "{x:Bind , Mode=OneWay}" />
            </Grid>
        </StackPanel>

    </Grid>
</Page>

PlayerPage.xaml.cs

namespace WinUI3Demo.Pages.MediaCenter
{
    /// <summary>
    /// An empty page that can be used on its own or navigated to within a Frame.
    /// </summary>
    public sealed partial class PlayerPage : Page
    {
        public PlayerPage()
        {
            this.InitializeComponent();
        }


        private void BackButton_Click(object sender, RoutedEventArgs e)
        {
            MainPage.MainFrame.Navigate(typeof(MediaCenterPage));
        }
    }
}

ViewModel//MediaModel.cs

namespace WinUI3Demo.ViewModels
{
    public class MediaModel : ObservableObject
    {
        private ObservableCollection<MediaObject> _objects;
        public ObservableCollection<MediaObject> Objects
        {
            get => _objects;
            set => SetProperty(ref _objects, value);
        }
        private MediaObject _selectedMovie;
        public MediaObject SelectedMovie
        {
            get => _selectedMovie;
            set => SetProperty(ref _selectedMovie, value);
        }

        public MediaModel()
        {
            Objects = new();
        }
        public void AddObject(MediaObject mediaObject)
        {
            Objects.Add(new MediaObject(mediaObject.Filename, mediaObject.Thumbnail, mediaObject.Title, mediaObject.Description, mediaObject.Trailer) { Id = Guid.NewGuid() });
        }
    }


    public class MediaObject : ObservableObject
    {
        public Guid Id { get; set; }
        public string Title { get; set; }
        public string Filename { get; set; }
        public string Description { get; set; }
        public BitmapImage Thumbnail { get; set; }
        public MediaSource Trailer { get; set; }
        public MediaSource Movie { get; set; }


        public MediaObject(string _filename, BitmapImage _thumbnail, string _title, string _description, MediaSource _trailer)
        {
            Filename = _filename;
            Thumbnail = _thumbnail;
            Title = _title;
            Description = _description;
            Trailer = _trailer;
            Movie = _trailer;
        }

    }

}