Avalonia社区帮助了我，并给了一个提示，当你关闭浏览器选项卡时-它“只是关闭”，没有事件和处理它的能力。在使用这些信息生活了一段时间后，我决定挖掘Avalonia源代码并找到AutoSuspendHelper构造函数的下一个代码：

public AutoSuspendHelper(IApplicationLifetime lifetime)
    {
        RxApp.SuspensionHost.IsResuming = Observable.Never<Unit>();
        RxApp.SuspensionHost.IsLaunchingNew = _isLaunchingNew;

        if (Avalonia.Controls.Design.IsDesignMode)
        {
            this.Log().Debug("Design mode detected. AutoSuspendHelper won't persist app state.");
            RxApp.SuspensionHost.ShouldPersistState = Observable.Never<IDisposable>();
        }
        else if (lifetime is IControlledApplicationLifetime controlled)
        {
            this.Log().Debug("Using IControlledApplicationLifetime events to handle app exit.");
            controlled.Exit += (sender, args) => OnControlledApplicationLifetimeExit();
            RxApp.SuspensionHost.ShouldPersistState = _shouldPersistState;
        }
        else if (lifetime != null)
        {
            var type = lifetime.GetType().FullName;
            var message = $"Don't know how to detect app exit event for {type}."; // Here exception throws!
            throw new NotSupportedException(message);
        }
        else
        {
            var message = "ApplicationLifetime is null. "
                        + "Ensure you are initializing AutoSuspendHelper "
                        + "after Avalonia application initialization is completed.";
            throw new ArgumentNullException(message);
        }
        
        var errored = new Subject<Unit>();
        AppDomain.CurrentDomain.UnhandledException += (o, e) => errored.OnNext(Unit.Default);
        RxApp.SuspensionHost.ShouldInvalidateState = errored;
    }

字符串
发现接口层次结构，我发现社区给出了绝对正确的提示，并决定重写我的App类，至少从我的WebApi服务器加载状态，并考虑将来实现一些手动状态保存：

public partial class App : Application
{
    public override void Initialize()
    {
        AvaloniaXamlLoader.Load(this);
    }

    public override void OnFrameworkInitializationCompleted()
    {
        IStateStorage<MainViewModel> stateStorage = ApplicationLifetime is IClassicDesktopStyleApplicationLifetime
            ? new LocalFileStateStorage<MainViewModel>("appstate.json")
            : new WebApiStateStorage<MainViewModel>("http://localhost:5173/ClientState");

        if (ApplicationLifetime is IClassicDesktopStyleApplicationLifetime desktop)
        {
            // now this code 
            var suspensionDriver = new DefaultSuspensionDriver<MainViewModel>(stateStorage);

            var suspension = new AutoSuspendHelper(ApplicationLifetime);
            RxApp.SuspensionHost.CreateNewAppState = () => new MainViewModel();
            RxApp.SuspensionHost.SetupDefaultSuspendResume(suspensionDriver);
            suspension.OnFrameworkInitializationCompleted();

            // Load the saved view model state.
            var state = RxApp.SuspensionHost.GetAppState<MainViewModel>();

            desktop.MainWindow = new MainWindow
            {
                DataContext = state
            };
            desktop.MainWindow.Show();
        }
        else if (ApplicationLifetime is ISingleViewApplicationLifetime singleViewPlatform)
        {
            var state = stateStorage.Load();

            singleViewPlatform.MainView = new MainView
            {
                DataContext = state
            };
        }

        base.OnFrameworkInitializationCompleted();
    }
}

型
结论我做的是更好的Ctrl+点击的方法与异常，而不是立即尝试谷歌它（对于这样年轻的框架有非常小的知识库）。