# Application shutdown

In order to shutdown an application built using Radical there are 3 main options.

**Canonical WPF way: `App.Current.Shutdown();`**

There is no reason to not use the default WPF standard way to shutdown the application, the only thing we cannot do in this case is to prevent the shutdown process to complete, we have no control over it.

When the `App.Current.Shutdown()` method is called the bootstrapper raises, via the message broker, the following event:

* `ApplicationShutdown`: that simply notifies to the application that is shutting down;

**2 way shutdown via `RadicalApplication.Shutdown();`**

If we need an option to cancel the application shutdown process we should use the `Shutdown()` method exposed by the `RadicalApplication`. In this way the following events are broadcasted/dispatched by the message broker:

1. `ApplicationShutdownRequested` is dispatched synchronously to the application and has a `Cancel` property that can be set to true to cancel the shutdown process;
2. `ApplicationShutdownCanceled` is broadcasted whenever the shutdown process is cancelled;
3. `ApplicationShutdown` is finally dispatched asynchronously to notify to the application that is shutting down;

To get an instance of the current `RadicalApplication` the following snippet can be used:

```
public partial class App : Application
{
    public App()
    {
        var radicalApplication = this.AddRadicalApplication<Presentation.MainView>();
    }
}
```

NOTE: the current `RadicalApplication` is not registered in the IoC container.

**2 way shutdown via `ApplicationShutdownRequest` message**

Exactly the same approach as above can be obtained broadcasting, via the message broker, the `ApplicationShutdownRequest` message, without the need to have a reference to the current radical application.


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