[WebToolsE2E][Green] VsDbgException raiseed when applying change to .NET 11 wasm standalone project

[LittleLittleCloud]

C# ext: 2.151.24
C#DK: 3.31.216

Step to reproduce

• dotnet new blazorwasm -f net11.0 to create a blazor standalone wasm for .NET 11
• open the project in vscode
• debug launch the project and making a change and apply hotreload
• go to hotreload output window and check their output

2026-09-02 10:46:09.576 [info]  Found 2 potentially changed, 0 deleted document(s) in project 'C:\src\BlazorWasm11\BlazorWasm11.csproj'
2026-09-02 10:46:09.581 [info]  Capabilities required by 'C:\src\BlazorWasm11\obj\Debug\net11.0\Microsoft.CodeAnalysis.Razor.Compiler\Microsoft.NET.Sdk.Razor.SourceGenerators.RazorSourceGenerator\Pages/Counter_razor.decl.g.cs': Baseline
2026-09-02 10:46:09.596 [info]  Capabilities required by 'C:\src\BlazorWasm11\obj\Debug\net11.0\Microsoft.CodeAnalysis.Razor.Compiler\Microsoft.NET.Sdk.Razor.SourceGenerators.RazorSourceGenerator\Pages/Counter_razor.g.cs': Baseline
2026-09-02 10:46:09.603 [info]  Document changed, added, or deleted: 'C:\src\BlazorWasm11\obj\Debug\net11.0\Microsoft.CodeAnalysis.Razor.Compiler\Microsoft.NET.Sdk.Razor.SourceGenerators.RazorSourceGenerator\Pages/Counter_razor.decl.g.cs'
2026-09-02 10:46:09.608 [info]  Document changed, added, or deleted: 'C:\src\BlazorWasm11\obj\Debug\net11.0\Microsoft.CodeAnalysis.Razor.Compiler\Microsoft.NET.Sdk.Razor.SourceGenerators.RazorSourceGenerator\Pages/Counter_razor.g.cs'
2026-09-02 10:46:09.613 [info]  Project summary for 'C:\src\BlazorWasm11\BlazorWasm11.csproj': ValidChanges
2026-09-02 10:46:09.654 [info]  Emitting update of 'C:\src\BlazorWasm11\BlazorWasm11.csproj'
2026-09-02 10:46:09.679 [info]  Applying code updates...
2026-09-02 10:46:09.681 [info]  Solution update 2.1 status: Ready
2026-09-02 10:46:09.686 [info]  Module update: capabilities=[Baseline], types=[02000007], methods=[0600000F]
2026-09-02 10:46:09.813 [info]  Exception thrown for Apply code updates: 0x80131500 - Error processing 'vsCustomMessage' request. 
2026-09-02 10:46:09.814 [info]  Stack trace for VsDbg.VsDbgException:
   at VsDbg.BrokeredServices.Services.HotReloadVsdbgEngineService.SendMessageAsync[T](ManagedEditAndContinueMessage message, CancellationToken cancellationToken)
   at VsDbg.BrokeredServices.Services.HotReloadVsdbgEngineService.ApplyCodeUpdatesAsync(ImmutableArray`1 updates, CancellationToken cancellationToken)
2026-09-02 10:46:09.817 [info]  An unexpected error has occurred, any pending updates have been discarded.
2026-09-02 10:46:09.818 [info]  ❌ Hot Reload failed due to an unexpected error.
2026-09-02 10:46:09.822 [info]  Exception found while applying code changes: Error: Error processing 'vsCustomMessage' request. 
2026-09-02 10:46:10.782 [info]  Document unchanged: 'C:\src\BlazorWasm11\Program.cs'
2026-09-02 10:46:10.788 [info]  Capabilities required by 'C:\src\BlazorWasm11\obj\Debug\net11.0\Microsoft.CodeAnalysis.Razor.Compiler\Microsoft.NET.Sdk.Razor.SourceGenerators.RazorSourceGenerator\Pages/Counter_razor.g.cs': Baseline

Things to note

• This issue DOESNT appear on .NET 10 wasm standalone project

[LittleLittleCloud]

related: dotnet/aspnetcore#67611