PrismApplication with DI

App.xaml.cs

    public partial class App : PrismApplication
    {
        private static bool _designContext = true;

        public App() : base(null){}

        public App(IPlatformInitializer initializer) : base(initializer) { }

        protected override void OnInitialized()
        {
            InitializeComponent();
            NavigationService.NavigateAsync("MyMasterDetailPage/MyNavigationPage/MainPage", animated: false);
        }

        protected override void RegisterTypes()
        {
            if (_designContext)
            {
                Container.RegisterType(typeof(ILocationClient), typeof(LocationDummyClient), null,
                    new ContainerControlledLifetimeManager());
                //Register platform specific interface implementations for design time (if you have any)
                //types for navigation don't have to be registered for the Previewer
            }
            else
            {
                Container.RegisterType(typeof(ILocationClient), typeof(LocationOnlineClient), null,
                    new ContainerControlledLifetimeManager());
                Container.RegisterTypeForNavigation<MyNavigationPage>();
                Container.RegisterTypeForNavigation<MainPage>();
                Container.RegisterTypeForNavigation<SettingsPage>();
                Container.RegisterTypeForNavigation<MyMasterDetailPage>();
            }
        }
    }