Why does SystemNavigationManager.GetForCurrentView().AppViewBackButtonVisibility cause

Question

SystemNavigationManager.GetForCurrentView().AppViewBackButtonVisibility = AppViewBackButtonVisibility.Collapsed;

The above code worked fine for a UWP app. After I migrated the app to WinUI, it throws:

System.AccessViolationException
  HResult=0x80004003
  Message=Attempted to read or write protected memory. This is often an indication that other memory is corrupt.
  Source=<Cannot evaluate the exception source>
  StackTrace:
<Cannot evaluate the exception stack trace>

Could anyone shed some light on this?

Answer 1

Hi @Hong ,

Welcome to Microsoft Q&A!

The class Windows.UI.Core.SystemNavigationManager is not support in WinUI3 project.

It is recommended that you use Microsoft.UI.Xaml.Controls.NavigationView in your WinUI3 project.

Thank you.

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