Remove namespace to be consistent with book

Chapter04/Complete/MyMediaCollection/App.xaml.cs

@@ -33,7 +33,7 @@ namespace MyMediaCollection
         /// Invoked when the application is launched.
         /// </summary>
         /// <param name="args">Details about the launch request and process.</param>
-        protected override void OnLaunched(Microsoft.UI.Xaml.LaunchActivatedEventArgs args)
+        protected override void OnLaunched(LaunchActivatedEventArgs args)
         {
             m_window = new MainWindow();
             var rootFrame = new Frame();

Chapter05/Complete/MyMediaCollection/App.xaml.cs

@@ -33,7 +33,7 @@ namespace MyMediaCollection
         /// Invoked when the application is launched.
         /// </summary>
         /// <param name="args">Details about the launch request and process.</param>
-        protected override void OnLaunched(Microsoft.UI.Xaml.LaunchActivatedEventArgs args)
+        protected override void OnLaunched(LaunchActivatedEventArgs args)
         {
             m_window = new MainWindow();
             var rootFrame = new Frame();

Chapter05/Start/MyMediaCollection/App.xaml.cs

@@ -33,7 +33,7 @@ namespace MyMediaCollection
         /// Invoked when the application is launched.
         /// </summary>
         /// <param name="args">Details about the launch request and process.</param>
-        protected override void OnLaunched(Microsoft.UI.Xaml.LaunchActivatedEventArgs args)
+        protected override void OnLaunched(LaunchActivatedEventArgs args)
         {
             m_window = new MainWindow();
             var rootFrame = new Frame();

Chapter06/Complete/MyMediaCollection/App.xaml.cs

@@ -33,7 +33,7 @@ namespace MyMediaCollection
         /// Invoked when the application is launched.
         /// </summary>
         /// <param name="args">Details about the launch request and process.</param>
-        protected override async void OnLaunched(Microsoft.UI.Xaml.LaunchActivatedEventArgs args)
+        protected override async void OnLaunched(LaunchActivatedEventArgs args)
         {
             m_window = new MainWindow();
             var rootFrame = new Frame();

Chapter06/Start/MyMediaCollection/App.xaml.cs

@@ -33,7 +33,7 @@ namespace MyMediaCollection
         /// Invoked when the application is launched.
         /// </summary>
         /// <param name="args">Details about the launch request and process.</param>
-        protected override void OnLaunched(Microsoft.UI.Xaml.LaunchActivatedEventArgs args)
+        protected override void OnLaunched(LaunchActivatedEventArgs args)
         {
             m_window = new MainWindow();
             var rootFrame = new Frame();

Chapter07/Complete/MyMediaCollection/App.xaml.cs

@@ -33,7 +33,7 @@ namespace MyMediaCollection
         /// Invoked when the application is launched.
         /// </summary>
         /// <param name="args">Details about the launch request and process.</param>
-        protected override async void OnLaunched(Microsoft.UI.Xaml.LaunchActivatedEventArgs args)
+        protected override async void OnLaunched(LaunchActivatedEventArgs args)
         {
             m_window = new MainWindow();
             var rootFrame = new Frame();

Chapter07/Start/MyMediaCollection/App.xaml.cs

@@ -33,7 +33,7 @@ namespace MyMediaCollection
         /// Invoked when the application is launched.
         /// </summary>
         /// <param name="args">Details about the launch request and process.</param>
-        protected override async void OnLaunched(Microsoft.UI.Xaml.LaunchActivatedEventArgs args)
+        protected override async void OnLaunched(LaunchActivatedEventArgs args)
         {
             m_window = new MainWindow();
             var rootFrame = new Frame();

Chapter08/Start/MyMediaCollection/App.xaml.cs

@@ -33,7 +33,7 @@ namespace MyMediaCollection
         /// Invoked when the application is launched.
         /// </summary>
         /// <param name="args">Details about the launch request and process.</param>
-        protected override async void OnLaunched(Microsoft.UI.Xaml.LaunchActivatedEventArgs args)
+        protected override async void OnLaunched(LaunchActivatedEventArgs args)
         {
             m_window = new MainWindow();
             var rootFrame = new Frame();