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public App()
{  
    MainPage = new UserInterfaces.Dashboard();
}

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  public class Dashboard : ContentPageBase<ViewModels.Dashboard>
  { 
      Grid _mainLayout;
      // 1
      Image _images;

      Label _status;

      // 2
      public Dashboard()

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public static class IObservableExtensions
{
    public static TDisposable DisposeWith<TDisposable>(this TDisposable observable, CompositeDisposable disposables) where TDisposable : class, IDisposable
    {
        if (observable != null)
            disposables?.Add(observable);

        return observable;
    }

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public class Dashboard : ViewModelBase<Dashboard>
{  
  [DataMember]
  public string Title
  {
      get { return "My Dashboard"; }
  }
  // 1
  string _statusMessage;

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[Register("AppDelegate")]
public partial class AppDelegate : global::Xamarin.Forms.Platform.iOS.FormsApplicationDelegate
{
    public override bool FinishedLaunching(UIApplication app, NSDictionary options)
    {
        global::Xamarin.Forms.Forms.Init();

        DependencyService.Register<Interfaces.IRendererResolver, Services.RendererResolver>();

        LoadApplication(new App());

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public class RendererResolver : Interfaces.IRendererResolver
{
    MethodInfo _cellRenderer;

    public RendererResolver()
    {
        _cellRenderer = typeof(CellRenderer).GetMethod("GetRenderer", BindingFlags.Static | BindingFlags.NonPublic);
    }

    public object GetCellRenderer(BindableObject element)

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protected override void OnCreate(Bundle bundle)
{
  TabLayoutResource = Resource.Layout.Tabbar;
  ToolbarResource = Resource.Layout.Toolbar;

  base.OnCreate(bundle);

  global::Xamarin.Forms.Forms.Init(this, bundle);
  // add this line 
  DependencyService.Register<Interfaces.IRendererResolver, Services.RendererResolver>();

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public class RendererResolver : Interfaces.IRendererResolver
{
    MethodInfo _cellRenderer;

    public RendererResolver()
    {
        _cellRenderer = typeof(CellRenderer).GetMethod("GetRenderer", BindingFlags.Static | BindingFlags.NonPublic);
    }

    public object GetCellRenderer(BindableObject element)

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public interface IRendererResolver
{
    object GetRenderer(VisualElement element);

    bool HasRenderer(VisualElement element);

    object GetCellRenderer(BindableObject element);

    bool HasCellRenderer(BindableObject element);
}

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// 1
public abstract class ContentPageBase<TViewModel> : ReactiveContentPage<TViewModel> where TViewModel : ViewModels.ViewModelBase<TViewModel>
{    
    // 2
    protected Lazy<CompositeDisposable> ControlBindings = new Lazy<CompositeDisposable>(() => new CompositeDisposable()); 

    // 3
    bool _controlsBound = false;

    // 4