title: Xamarin.Forms DynamicResource doesn't seem to be working
body: <p>I can't seem to get a <code>DynamicResource</code> working correctly.</p>
  
  <p>Here's the XAML in App.xml:</p>
  
  <pre><code>&lt;Application.Resources&gt;
      &lt;ResourceDictionary&gt;
          &lt;Thickness x:Key ="DefaultInsets"
                     Bottom="4"
                     Top   ="4"
                     Left  ="8"
                     Right ="8" /&gt;
      &lt;/ResourceDictionary&gt;
  &lt;/Application.Resources&gt;
  </code></pre>
  
  <p>And here's what I'm trying to do inside another file's <code>ContentView</code>:</p>
  
  <pre><code>&lt;StackLayout 
      VerticalOptions="Center" 
      HeightRequest="225" 
      Margin="{DynamicResource DefaultInsets}" &gt;
          &lt;Entry
              x:Name="nameControl"
              Placeholder="Full Name"
              Margin="{DynamicResource DefaultInsets}"
              /&gt;
          &lt;Entry
              x:Name="passwordControl"
              IsPassword="True"
              Placeholder="Password"
              Margin="{DynamicResource DefaultInsets}" /&gt;
  &lt;/StackLayout&gt;
  </code></pre>
  
  <p>It seems like this should make consistent insets for the <code>StackLayout</code> from the <code>ContentView</code>, and for the <code>Entry</code> fields from the <code>StackLayout</code>. But I don't see any of that.</p>
  
  <p>What have I done wrong?</p>
  
  <p><strong>Update</strong> : I have also tried this with <code>StaticResource</code>, and still no luck.</p>