WIN UI Failure: Operation is not valid due to the current state of the object.

[Volker911]

Hello, I am using MonkeyCache.FileStore with a new .NET 9 Maui project. Everything works well on Android, but the system fails on Windows UI.

In App.xaml.cs, I initialize the FileStore with: Barrel.ApplicationId = "IGT_OfflineData";

Then, I have the following three lines of code:

string test = "Failure Test";
string test2 = Barrel.ApplicationId;
Barrel.Current.Add("UserAppTheme", test, TimeSpan.FromDays(365));

When I debug, test2 equals "IGT_OfflineData", but the failure occurs at Barrel.Current.Add on the Windows machine. (On Android, everything works well.)

Here is the failure:

System.InvalidOperationException
HResult=0x80073D54
Nachricht = Operation is not valid due to the current state of the object.
Quelle = WinRT.Runtime
Stapelüberwachung:
bei WinRT.ExceptionHelpers.g__Throw|38_0(Int32 hr)
bei ABI.Windows.Storage.IApplicationDataStaticsMethods.get_Current(IObjectReference _obj)
bei Windows.Storage.ApplicationData.get_Current()
bei MonkeyCache.BarrelUtils.GetBasePath(String applicationId)
bei MonkeyCache.FileStore.Barrel.<>c__DisplayClass4_0.<.ctor>b__0()
bei System.Lazy1.ViaFactory(LazyThreadSafetyMode mode) bei System.Lazy1.ExecutionAndPublication(LazyHelper executionAndPublication, Boolean useDefaultConstructor)
bei System.Lazy`1.CreateValue()
bei MonkeyCache.FileStore.Barrel.LoadIndex()
bei MonkeyCache.FileStore.Barrel..ctor(String cacheDirectory, HashAlgorithm hash)
bei MonkeyCache.FileStore.Barrel.get_Current()
bei IGTConnect.AppShell.SfSegmentedControl_SelectionChanged(Object sender,

Hope someone can Help..