Minimal UWP App.xaml.cs

App.xaml.cs

// You don't need all of the crud the new project wizard barfs out.

using Windows.ApplicationModel.Activation;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;

namespace MyThing
{
    sealed partial class App : Application
    {
        public App()
        {
            this.InitializeComponent();
        }

        protected override void OnLaunched(LaunchActivatedEventArgs e)
        {
            var rootFrame = Window.Current.Content as Frame;
            if (rootFrame == null) Window.Current.Content = rootFrame = new Frame();
            if (rootFrame.Content == null) rootFrame.Navigate(typeof(MainPage), e.Arguments);
            Window.Current.Activate();
        }
    }
}