title: Xamarin Navigating from a TabbedPage app
body: <p>I've been tinkering with Xamarin forms and I have run into a bit of a road block. I have an app whose rootPage is a TabbedPage. I programmatically add three child Contentpages to this page. All this works fine. However, these pages open up other pages which may or may not open other pages etc.</p>
  
  <p>I have tried to use ContentPage for the child pages and pass the rootpage Navigation property into them and use that to call Navigation.PushAsync I have also tried to make the pages navigation pages and then call Navigation.PushAsync on their own property: this throws some unhandled exception</p>
  
  <p>Can anyone please help!</p>