Why the xercise in "Design an MVVM viewmodel for .NET MAUI" has not a backbutton

Hi nor ya,

Thank you for reaching out to Microsoft Q & A forum.  

In .NET MAUI, the back button behavior is typically handled automatically when you navigate between pages using NavigationPage. However, if you're not seeing a back button on the detail page, it's likely that the navigation is not wrapped within a NavigationPage, or there might be a specific configuration issue in the navigation setup. 

To add the back button to your detail page, make sure that your main page (or the page you're navigating from) is wrapped in a NavigationPage. This ensures that the navigation stack is managed correctly, and the back button will appear on the detail page. Here’s an example of how to set this up: 

In your App.xaml.cs or MainPage.xaml.cs: 

MainPage = new NavigationPage(new MainPage());

In the DetailPage.xaml, ensure that the page is set up for navigation: 

<ContentPage xmlns="http://schemas.microsoft.com/dotnet/2023/maui"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             x:Class="YourApp.DetailPage">
    <!-- Your page content here -->
</ContentPage>

If the issue persists, it could be due to how the navigation is being handled in the code-behind. Ensure that when you navigate to the detail page, you’re using Navigation.PushAsync(): 

await Navigation.PushAsync(new DetailPage());

Please feel free to contact us if you have any additional questions.    

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