Validation - Analyzer diagnostics for stale authentication state

Scenario: dotnet/aspnetcore #68488

Manual: dotnet/aspnetcore #68479

Build tested

.NET SDK 11.0.100-preview.7.26381.103

The scenario requires .NET 11 Preview 7 or later.

Sample application

This repository contains a Blazor Web App using Interactive Server rendering for the validation page.

Start at /stale-auth-demo to access the complete sample set.

Expected BL0013 warnings

Consumer	Route	Purpose
StaleUserBadge	/stale-auth-demo	Reads authentication state once without subscribing to changes
CachedUserService	/stale-auth-demo	Caches authentication state without subscribing to changes

Expected no BL0013 warning

Consumer	Route	Purpose
LiveUserBadge	/stale-auth-demo	Subscribes to AuthenticationStateChanged
LiveCachedUserService	/stale-auth-demo	Keeps its cached state synchronized with authentication changes
CascadingUserBadge	/stale-auth-demo	Reads authentication state from a cascading parameter
<AuthorizeView>	/stale-auth-demo	Uses the framework authorization-state consumer
<CascadingAuthenticationState>	/stale-auth-demo	Supplies live authentication state to descendants

How to run

From the repository root:

dotnet run --project StaleAuthStateSample.csproj --launch-profile http

Open http://localhost:5093/stale-auth-demo.

How to verify the build diagnostic

dotnet clean StaleAuthStateSample.slnx -nologo -v:minimal
dotnet build StaleAuthStateSample.slnx -t:Rebuild -nologo -v:minimal

Expected result: StaleUserBadge and CachedUserService produce BL0013 warnings. LiveUserBadge, LiveCachedUserService, CascadingUserBadge, <AuthorizeView>, and <CascadingAuthenticationState> produce no BL0013 warning.

Configuration tested

• Blazor Web App - Interactive Server
• Visual Studio 2022 and command-line builds
• Published Release output (dotnet publish -c Release)

The diagnostic is produced at compile time and does not vary by render mode.

Evidence

• Screenshots: evidence/screenshots/
• Interaction recordings: evidence/videos/
• Test report: test-report/VALIDATION_REPORT.md