title: Changing Theme in Windows 10 UWP App Programmatically
body: <p>I was able to change theme using <code>this.RequestedTheme = ElementTheme.Dark;</code>
  But what I need is the whole application level, since this one only change the theme of the current page to dark.</p>
  
  <p>Whenever I try this <code>App.Current.RequestedTheme = ApplicationTheme.Dark;</code>
  I always get this error</p>
  
  <blockquote>
    <p>An exception of type 'System.NotSupportedException' occurred in UWPApp.exe but was not handled in user code</p>
  </blockquote>
  
  <p>Is there such a way that I can change the whole application theme from Light to Dark or vice versa?</p>
  
  <p>I'm using VS2015</p>