我该如何处理witui 3
这次，我必须将UWP应用程序迁移到Winui 3，到目前为止，除了一些小事情外，一切都很好，但是事件onsuspending根本没有触发。在命名空间Windows.ui.xaml中，您可以轻松地
this.Suspending += OnSuspending
在app.xaml.cs中使用，这不是问题，在microsoft.ui.xaml中，我不能这样做。现在，我已经在app.xaml.cs中声明了desedeventHandler，
public event SuspendingEventHandler Suspending;
但这是行不通的。我该如何解决这个问题？
This time I must migrate an UWP App to WinUI 3, so far everything has worked well except for a few small things but the event OnSuspending is simply not triggered. In the namespace Windows.UI.Xaml you could easily use
this.Suspending += OnSuspending
in app.xaml.cs and it wasn't a problem, in Microsoft.UI.Xaml I can't do this. I have now declared a SuspendingEventhandler in app.xaml.cs
public event SuspendingEventHandler Suspending;
but this just doesn't work. How can I solve this problem?
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WinUI 3 可用于构建桌面/WIn32 Windows 应用程序（请参阅docs）并且此类应用程序是不暂停 因此不会引发任何
Suspending事件。WinUI 3 can be used to build desktop/WIn32 Windows apps (see the docs) and this kind of apps are not suspended so there is no
Suspendingevent ever being raised.