<Page
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:viewModels="using:Client.ViewModel"
x:Class="Client.View.ViewMain"
mc:Ignorable="d">

<Grid x:Name="ContentGrid" RequestedTheme="Light">
    <Grid.ColumnDefinitions>
        <ColumnDefinition Width="Auto"/>
        <ColumnDefinition Width="Auto"/>
        <ColumnDefinition Width="Auto"/>
    </Grid.ColumnDefinitions>
    <StackPanel Name="FeatureLeft"      Orientation="Horizontal" Grid.Column="0"/>
    <StackPanel Name="FeatureCenter"    Orientation="Horizontal" Grid.Column="1"/>
    <StackPanel Name="FeatureRight"     Orientation="Horizontal" Grid.Column="2"/>
</Grid>
</Page>

public sealed partial class ViewMain : Page
{

    public ViewModelMain viewModelMain;

    public ViewMain()
    {
        this.InitializeComponent();
        viewModelMain = new ViewModelMain();
        viewModelMain.RegisterFeatures(this);
    }
}

public class ViewModelMain: NotificationBase
{
    public ModelMain model;
    public ViewModelMain()
    {
        model = new ModelMain();
        _Features = model.LoadFeatures();
    }

    public void RegisterFeatures(Page p)
    {
        foreach (var feature in _Features)
        {
            feature.AddToView(p);
        }
    }

    ObservableCollection<IViewFeature> _Features = new ObservableCollection<IViewFeature>();
    public ObservableCollection<IViewFeature> Features {
        get { return _Features; }
        set { SetProperty(ref _Features, value); }
    }

}

public class ModelMain
{

    public ObservableCollection<IViewFeature> FeatureList;


    public ObservableCollection<IViewFeature> LoadFeatures()
    {
        FeatureList = new ObservableCollection<IViewFeature>();
        IViewFeature galleryFeature = new Gallery.View.ViewGallery();
        FeatureList.Add(galleryFeature);

        return FeatureList;
    }

}

public void AddToView( Page p)
    {
        StackPanel target = (StackPanel)p.FindName("FeatureLeft");
        target.Children.Add(this);
    }