Fixes app navigation

src/MAUI/Maui.Samples/AppShell.xaml.cs

@@ -36,7 +36,7 @@ private async Task CheckApiKey()
         ApiKeyStatus status = await ApiKeyManager.CheckKeyValidity();
         if (status != ApiKeyStatus.Valid)
         {
-            await Navigation.PushAsync(new ApiKeyPage(), true);
+            await Shell.Current.Navigation.PushAsync(new ApiKeyPage(), true);
         }
     }
     #endregion

src/MAUI/Maui.Samples/Samples/Layers/ChangeSublayerVisibility/ChangeSublayerVisibility.xaml.cs

@@ -98,7 +98,7 @@ private async void OnSublayersClicked(object sender, EventArgs e)
                 };
 
                 // Navigate to the sublayers page
-                await Navigation.PushAsync(sublayersPage);
+                await Shell.Current.Navigation.PushAsync(sublayersPage);
             }
             catch (Exception ex)
             {

src/MAUI/Maui.Samples/Samples/Layers/IdentifyKmlFeatures/IdentifyKmlFeatures.xaml.cs

@@ -80,7 +80,7 @@ private async void MyMapView_GeoViewTapped(object sender, Esri.ArcGISRuntime.Mau
                 }
 
                 // Show a page with the HTML content
-                await Navigation.PushAsync(new KmlIdentifyResultDisplayPage(firstIdentifiedPlacemark.BalloonContent));
+                await Shell.Current.Navigation.PushAsync(new KmlIdentifyResultDisplayPage(firstIdentifiedPlacemark.BalloonContent), false);
             }
             catch (Exception ex)
             {

src/MAUI/Maui.Samples/Samples/Layers/WmsIdentify/WmsIdentify.xaml.cs

@@ -101,7 +101,7 @@ private async void MyMapView_GeoViewTapped(object sender, Esri.ArcGISRuntime.Mau
                 }
 
                 // Show a page with the HTML content
-                await Navigation.PushAsync(new WmsIdentifyResultDisplayPage(htmlContent));
+                await Shell.Current.Navigation.PushAsync(new WmsIdentifyResultDisplayPage(htmlContent));
             }
             catch (Exception ex)
             {

src/MAUI/Maui.Samples/Samples/Map/AuthorMap/AuthorMap.xaml.cs

@@ -79,7 +79,7 @@ private void ShowSaveMapUI(object sender, EventArgs e)
             mapInputForm.OnSaveClicked += SaveMapAsync;
 
             // Navigate to the SaveMapPage UI.
-            Navigation.PushAsync(mapInputForm);
+            Shell.Current.Navigation.PushAsync(mapInputForm);
         }
 
         // Event handler to get information entered by the user and save the map.

src/MAUI/Maui.Samples/Samples/NetworkAnalysis/RouteAroundBarriers/RouteAroundBarriers.xaml.cs

@@ -307,7 +307,7 @@ private void ShowDirections_Clicked(object sender, EventArgs e)
 
         private async Task ShowDirectionsTask()
         {
-            await Navigation.PushAsync(_directionsPage);
+            await Shell.Current.Navigation.PushAsync(_directionsPage);
         }
 
         private async Task<PictureMarkerSymbol> GetPictureMarker()

src/MAUI/Maui.Samples/Samples/Security/TokenSecuredChallenge/TokenSecuredChallenge.xaml.cs

@@ -97,7 +97,7 @@ private async Task<Credential> CreateCredentialAsync(CredentialRequestInfo info)
 
             // Show the login controls on the UI thread.
             // OnLoginInfoEntered event will return the values entered (username and password).
-            Microsoft.Maui.ApplicationModel.MainThread.BeginInvokeOnMainThread(async () => await Navigation.PushAsync(_loginPage));
+            Microsoft.Maui.ApplicationModel.MainThread.BeginInvokeOnMainThread(async () => await Shell.Current.Navigation.PushAsync(_loginPage));
 
             // Return the login task, the result will be ready when completed (user provides login info and clicks the "Login" button)
             return await _loginTaskCompletionSrc.Task;

src/MAUI/Maui.Samples/Views/CategoryPage.xaml.cs

@@ -60,12 +60,12 @@ private async void FeedbackToolbarItem_Clicked(object sender, EventArgs e)
 
     private async void SettingsClicked(object sender, EventArgs e)
     {
-        await Navigation.PushAsync(new SettingsPage(), true);
+        await Shell.Current.Navigation.PushAsync(new SettingsPage(), true);
     }
 
     private async void SearchClicked(object sender, EventArgs e)
     {
-        await Navigation.PushAsync(new SearchPage(), false);
+        await Shell.Current.Navigation.PushAsync(new SearchPage(), false);
     }
 
     // The favorites icon can flicker when using a pen as pointer.