Prism Debug

App.xaml.cs

public partial class App : PrismApplication
{
    public App(IPlatformInitializer initializer = null) : base(initializer)
    {
    }
    
    protected override void OnInitialized()
    {
        try
        {
            // The most common problem when a view does not appear is an initialization exception.
            Container.Resolve<object>("ViewA");
            Container.Resolve<ViewModels.ViewAViewModel>();
            
            // In the event that you got here then you can begin debugging by initializing INavigationAware
            // ViewModels and/or manually setting the Application MainPage. This will likely result in an exception
            // being thrown to help diagnose exactly where your problem is.
        }
        catch(Exception e)
        {
            System.Diagnostics.Debug.WriteLine("Whoops, looks like we threw an exception...");
            System.Diagnostics.Debug.WriteLine(e);
        }
    
        NavigationService.NavigateAsync("ViewA");
    }
    
    protected override void RegisterTypes()
    {
        Container.RegisterTypeForNavigation<ViewA>();
    }
}