title: MapWithOverlaysActivity - Could not determine $(TargetFrameworkVersion)
body: <p>I have downloaded <code>Xamarin</code> Studio and am trying to use the MapsAndLocationDemo3 sample with the MapWithOverlaysActivity project.</p>
  
  <p>I am getting the following error:</p>
  
  <pre><code>C:\Program Files (x86)\MSBuild\Xamarin\Android\Xamarin.Android.Common.targets(2,2): Error XA0000: Could not determine $(TargetFrameworkVersion) for API level '19.' (XA0000) (SimpleMapDemo)
  </code></pre>
  
  <p>In the <code>Android SDK Manager</code> I have installed all the options for <code>Android 4.4 (API 19)</code> as well as the Google Play services.</p>
  
  <p>Can I please have some help to get this sample working?</p>
  
  <p>Thanks</p>