Application.Exit Event not invoked on system reboot

Question

I have a WPF application that needs to save its current state every time the application exits. At the moment, I am handling the System.Windows.Application.Exit event to save the state of the application. However, it seems that the event is not invoked system reboots -- only ordinary shutdowns. Is this expected behavior?

This is what my application looks like.

public class MyApp : Application
{
    protected override void OnStartup(StartupEventArgs e)
    {
        base.OnStartup(e);
        ...
        this.Exit += OnExit;
    }
    private void OnExit(object sender, ExitEventArgs e)
    {
        SaveMyApplicationState();
    }
}

What events can I use to be notified of a system reboot, so my application state can be saved?

Answer 1

To determine when system is restarting or shutting down use the SessionEnding event:

App.xaml

<Application ...
     SessionEnding="App_SessionEnding">
    ...
</Application>

App.xaml.cs

public partial class App : Application
{
    void App_SessionEnding(object sender, SessionEndingCancelEventArgs e)
    {
        if (.../*canceling*/)
        {
            e.Cancel = true;
        }
        else
        { 
            // Processing before terminating (save current state)
            // ...               
        }
    }
}

For detailed information see documentation: Application.SessionEnding Event

NOTE: Application Shutdown Changes in Windows Vista