title: ContentView content width and height -1 when ContentView is well sized
body: <p>I have a simple <code>Xamarin.Forms</code> project with a <code>ContentView</code> that I'd like to add to a <code>ContentPage</code></p>
  
  <pre class="lang-xml prettyprint-override"><code>&lt;ContentView xmlns="http://xamarin.com/schemas/2014/forms" 
               xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
               x:Class="NamespaceX.Xamarin.Target" 
               BackgroundColor="Red"&gt;
  &lt;ContentView.Content&gt;
      &lt;Button Text="Welcome to Xamarin.Forms!" 
              x:Name="ButtonName"
              VerticalOptions="Center" 
              HorizontalOptions="Center"/&gt;
  &lt;/ContentView.Content&gt;
  </code></pre>
  
  <p></p>
  
  <p>Here is my <code>ContentPage</code></p>
  
  <pre class="lang-xml prettyprint-override"><code>&lt;ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
               xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
               xmlns:local="clr-namespace:NamespaceX.Xamarin"
               x:Class="NamespaceX.Xamarin.MainPage"&gt;
      &lt;local:Target&gt;&lt;/local:Target&gt;
  &lt;/ContentPage&gt;
  </code></pre>
  
  <p>The <code>ContentView</code> is indeed added to the <code>ContentPage</code> as the <code>ContentPage</code> turns red but no content is displayed.
  When I add a <code>SizeChanged</code> event listener in the <code>ContentView</code></p>
  
  <pre class="lang-cs prettyprint-override"><code>private void View_SizeChanged(object sender, EventArgs e)
  {
      Debug.WriteLine(this.Width);
      Debug.WriteLine(this.Height);
      Debug.WriteLine(this.Content.Width);
      Debug.WriteLine(this.Content.Height);
  }
  </code></pre>
  
  <p>The width and height of the <code>ContentView</code> are indeed set <code>Width: 360</code>, <code>Height: 616</code> but the Content width and height are <code>-1</code>.</p>
  
  <p><strong>EDIT</strong></p>
  
  <p>I just noticed it was not working using the Xamarin Live Player but was working with the emulator...</p>