title: CollectionView Xamarin not showing
body: <p>I have a ListView and a CollectionView (Xam 4 pre-8 ). I added the ListView is to prove items show. The binding appears correctly and I have added Xam 4 to all of the projects. CollectionView does not appear. Why?</p>
  
  <p>AppDelegate:</p>
  
  <pre><code>        public override bool FinishedLaunching(UIApplication app, NSDictionary options)
      {
          Forms.SetFlags("CollectionView_Experimental");
          global::Xamarin.Forms.Forms.Init();
  
          LoadApplication(new App());
  
          return base.FinishedLaunching(app, options);
      }
  </code></pre>
  
  <p>Content Page:</p>
  
  <pre><code>&lt;ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
           xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
           xmlns:viewmodels="clr-namespace:RecipeTonight.Mobile.ViewModels"
           x:Class="RecipeTonight.Mobile.Views.WelcomePage"
           NavigationPage.HasNavigationBar="False"
  
           &gt;
  &lt;ContentPage.Content &gt;
      &lt;StackLayout VerticalOptions="CenterAndExpand"
          Margin="20"
          BackgroundColor="#e9e9e9"
  
          &gt;
          &lt;Label Text="Hello World" /&gt;
          &lt;CollectionView ItemsSource="{Binding RecipeList}" &gt;
              &lt;CollectionView.ItemTemplate&gt;
                  &lt;DataTemplate&gt;
  
                      &lt;Grid&gt;
                          &lt;Grid.RowDefinitions&gt;
                              &lt;RowDefinition Height="Auto" /&gt;
                              &lt;RowDefinition Height="Auto" /&gt;
                          &lt;/Grid.RowDefinitions&gt;
  
                          &lt;Grid.ColumnDefinitions&gt;
                              &lt;ColumnDefinition Width="Auto" /&gt;
                              &lt;ColumnDefinition Width="Auto" /&gt;
                          &lt;/Grid.ColumnDefinitions&gt;
  
                          &lt;Label Grid.Row="0" Grid.Column="0"
                     Text="Test"
                     FontAttributes="Italic"
                     VerticalOptions="End" /&gt;
                      &lt;/Grid&gt;
                  &lt;/DataTemplate&gt;
              &lt;/CollectionView.ItemTemplate&gt;
  
          &lt;/CollectionView&gt;
          &lt;ListView ItemsSource="{Binding RecipeList}"&gt;
              &lt;ListView.ItemTemplate&gt;
                  &lt;DataTemplate&gt;
                      &lt;ViewCell Height="40"&gt;
                          &lt;Label Text="{Binding Title}"&gt;&lt;/Label&gt;
                      &lt;/ViewCell&gt;
                  &lt;/DataTemplate&gt;
              &lt;/ListView.ItemTemplate&gt;
          &lt;/ListView&gt;
      &lt;/StackLayout&gt;
  &lt;/ContentPage.Content&gt;
  </code></pre>
  
  <p></p>
  
  <p>On the screen I see <a href="https://i.stack.imgur.com/70YdR.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/70YdR.png" alt="Simulator iOS"></a></p>