Spotify.NET/SpotifyAPI.Web.Examples/Example.UWP/App.xaml

<local:ExampleApp x:Class="Example.UWP.App"
                        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
                        xmlns:local="using:Example.UWP"
                        RequestedTheme="Dark">
  <Application.Resources>
    <x:String x:Key="WelcomeText">Hello World!</x:String>
  </Application.Resources>
</local:ExampleApp>