```PackageCatalog.PackageUpdating``` event cause app exit abnormally

[Gaoyifei1011]

Describe the bug

PackageCatalog.PackageUpdating event cause app exit abnormally

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PackageCatalog.PackageUpdating 事件导致应用退出异常

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Steps to reproduce the bug

1. Create a blank WinUI 3 application
2. PackageCatalog.PackageUpdating events
3. Exit the application
4. Observe the performance of the corresponding process in the Task Manager (or mount the Visual Studio debugger to view)

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1. 创建一个空白 WinUI 3 应用
2. 挂载 PackageCatalog.PackageUpdating 事件
3. 退出应用
4. 看任务管理器对应进程的表现（或挂载 Visual Studio 调试器查看）

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Expected behavior

Mount PackageCatalog.PackageUpdating event, application can exit out of normal process will not trigger the exception

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挂载 PackageCatalog.PackageUpdating 事件后，应用退出能正常退出进程，不会触发异常

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Screenshots

NuGet package version

Windows App SDK 1.8.3: 1.8.251106002

Packaging type

Packaged (MSIX)

Windows version

Windows 11 version 24H2 LTSC (26100, June Update)
26220.7070

IDE

Visual Studio 2022

Additional context

QQ20251116-10612.mp4

https://learn.microsoft.com/uwp/api/windows.applicationmodel.packagecatalog.packageupdating?view=winrt-26100

App1.zip

Similar issues:
microsoft/winget-cli#5870
microsoft/winget-cli#5869