Chris Bardon

Interesting... I haven't tried on 9, but you're saying closing the spawned dialog with the corner X doesn't throw that exception? We've got the same issue reproducing on multiple developer...

Sure, here's the call stack: System.Private.CoreLib.dll!System.SR.InternalGetResourceString(string key) Line 71 C# System.Private.CoreLib.dll!System.SR.GetResourceString(string resourceKey) Line 38 C# System.Private.CoreLib.dll!System.NullReferenceException.NullReferenceException() Line 18 C# [Native to Managed Transition] System.Private.CoreLib.dll!System.Globalization.CultureInfo.CurrentUICulture.get() Line 400 C# System.Private.CoreLib.dll!System.Resources.ResourceManager.GetString(string name, System.Globalization.CultureInfo...

So if I break into that code, the message is: "Encountered infinite recursion while looking up resource 'Arg_NullReferenceException' in System.Private.CoreLib. Verify the installation of .NET is complete and does not...

Tracing this further up, it seems to be in HwndSubclass.cs, where Thread.CurrentThread is null here: ``` // Pass this message to our delegate function. Do this under // the exception...

Wouldn't it make sense that the thread could be null at that point if the thread that created the dialog had already ended? Is there something that webview2 might be...

Publish logs for unsuccessful op are: ``` 2>------ Publish started: Project: ACSWPFTest, Configuration: Release x64 ------ 2>Determining projects to restore... 2>Restored D:\testcode\ACSConsoleTestWindows\ACSWPFTest\ACSWPFTest.csproj (in 772 ms). 2>C:\Program Files\Microsoft Visual Studio\2022\Enterprise\MSBuild\Current\Bin\Roslyn\csc.exe /noconfig...

Can also confirm that the issue is identical in CSWinRT 2.1.0-prerelease.240801.1