[linkdotnet]

Summary

Upgrade to .NET 11 and turn on runtime async (<Features>runtime-async=on</Features>).

 global.json              sdk 10.0.100 -> 11.0.100
 Directory.Build.props
-  <TargetFramework>net10.0</TargetFramework>
+  <TargetFramework>net11.0</TargetFramework>
+  <Features>$(Features);runtime-async=on</Features>
+  <WarningsNotAsErrors>NU1608</WarningsNotAsErrors>   # Npgsql rc.3 pins EF Core rc.3
+  <NoWarn>BL0013;BL0016;S3881</NoWarn>                 # new .NET 11 analyzers
 Dockerfile / CI          10.0 -> 11.0
 Directory.Packages.props Microsoft.* 10.0.14 -> 11.0.0, rest to latest
   Npgsql.EntityFrameworkCore.PostgreSQL   10.0.3  -> 11.0.0-rc.3
   Microting.EntityFrameworkCore.MySql     10.0.14 -> 11.0.0-preview.1

Code changes the upgrade forced:

 BlogPost(Version)Configuration
-  builder.Property(x => x.Tags)           # EF 11: no longer becomes a primitive collection
+  builder.PrimitiveCollection(x => x.Tags)
 AuthExtensions / SitemapService           # CA1307
-  .StartsWith('/')
+  .StartsWith('/', StringComparison.Ordinal)
 6 x razor handlers                        # BL0012: @onclick / EventCallback re-render anyway
-  StateHasChanged();

Evidence

• Before: after the bump, 16 integration tests (search and search-by-tag) failed:
  The LINQ expression 'DbSet<BlogPost>().Where(b => b.IsPublished && b.Tags.Contains(@Tag))' could not be translated
  After: dotnet test -c Release passed 700/700 (integration 228, unit 449, upgrade assistant 23)
• Runtime async is active. Compiler-generated async state machines in LinkDotNet.Blog.Infrastructure.dll: 29 → 0

Merge Danger

Door: two-way

The stored data doesn't change: Tags was already stored as a JSON primitive collection, and no schema change is needed. Reverting the PR restores .NET 10.

Blast Radius: hosting

• The host needs the .NET 11 runtime (the Docker image is handled).
• The PostgreSQL and MySQL providers are prereleases, and the tests only run on SQLite, so those two providers are not tested.
• Runtime async is a preview feature.

[Copilot]

🔵 Needs a closer look

Solution-wide preview async changes and prerelease PostgreSQL/MySQL providers with an overridden EF Core constraint require human-led compatibility validation beyond SQLite-only tests.

No open issues 🎉

What changed in this PR

Upgrades the blog application, build pipeline, and container images to .NET 11, enables runtime async, and adapts persistence mappings and UI code for the upgrade.

Changes:

• Updates the SDK, target framework, dependencies, Docker images, and CI configuration.
• Explicitly maps tag collections for EF Core 11 and adds ordinal URL comparisons.
• Removes explicit render calls from selected Blazor handlers and adjusts analyzer warning handling.

File	Description
tests/​LinkDotNet.Blog.IntegrationTests/​LinkDotNet.Blog.IntegrationTests.csproj	Removes the direct configuration abstractions dependency.
src/​LinkDotNet.Blog.Web/​Features/​ShowBlogPost/​ShowBlogPostPage.razor	Removes the explicit render call after bookmarking.
src/​LinkDotNet.Blog.Web/​Features/​Components/​ShortBlogPost.razor	Removes the explicit render call after bookmarking.
src/​LinkDotNet.Blog.Web/​Features/​Admin/​Sitemap/​Services/​SitemapService.cs	Uses an ordinal trailing-slash comparison.
src/​LinkDotNet.Blog.Web/​Features/​Admin/​BlogPostEditor/​UpdateBlogPostPage.razor	Removes the explicit render call after restoring a version.
src/​LinkDotNet.Blog.Web/​Features/​Admin/​BlogPostEditor/​Components/​VersionDiffDialog.razor	Removes the explicit render call when closing the dialog.
src/​LinkDotNet.Blog.Web/​Features/​Admin/​BlogPostEditor/​Components/​CreateNewBlogPost.razor	Removes explicit render calls from shortcode and template handlers.
src/​LinkDotNet.Blog.Web/​Authentication/​OpenIdConnect/​AuthExtensions.cs	Uses an ordinal logout-path comparison.
src/​LinkDotNet.Blog.Infrastructure/​Persistence/​Sql/​Mapping/​BlogPostVersionConfiguration.cs	Explicitly maps version tags as a primitive collection.
src/​LinkDotNet.Blog.Infrastructure/​Persistence/​Sql/​Mapping/​BlogPostConfiguration.cs	Explicitly maps post tags as a primitive collection.
global.json	Selects the .NET 11 SDK.
Dockerfile	Updates SDK and ASP.NET runtime images to .NET 11.
Directory.Packages.props	Updates framework, provider, test, and tooling dependencies.
Directory.Build.props	Targets .NET 11, enables runtime async, and adjusts warning handling.
.github/​workflows/​dotnet.yml	Installs .NET 11 for build and test CI.
.github/​workflows/​codeql.yml	Replaces .NET 10 with .NET 11 in the CodeQL SDK setup.

_{Review effort: Balanced}