Start Debugging

EN

Daily notes on .NET, C#, EF Core, MAUI, Blazor, and Flutter - for developers who ship.

Start here › Tags Archive

2026-04-13 dotnet-11 ef-core

EF Core 11 Adds Native SQL Server Vector Search with DiskANN Indexes

EF Core 11 Preview 2 supports SQL Server 2025 VECTOR_SEARCH() and DiskANN vector indexes directly from LINQ. Here is how to set up the index, run approximate queries, and what changes from the EF Core 10 VectorDistance approach.

2026-04-08 csharp dotnet

C# 15 Union Types Are Here: Type Unions Ship in .NET 11 Preview 2

C# 15 introduces the union keyword for type unions with exhaustive pattern matching and implicit conversions. Available now in .NET 11 Preview 2.

2026-04-06 dotnet-11 csharp

.NET 11 Runtime Async Replaces State Machines with Cleaner Stack Traces

Runtime Async in .NET 11 moves async/await handling from compiler-generated state machines into the runtime itself, producing readable stack traces, correct breakpoints, and fewer heap allocations.

2026-10-08 comparison ef-core dotnet

AddDbContextPool vs AddDbContextFactory for running EF Core queries in parallel

AddDbContextPool hands out one scoped DbContext per DI scope, so it cannot run two queries at once. AddDbContextFactory and AddPooledDbContextFactory give you a context per call, which is what parallel queries need. Measured on EF Core 11 RC 1: the pooled factory creates a context in 342 ns and 40 B versus 17 us and 44 KB.

2026-10-08 agent-framework dotnet anthropic

Agent Framework 1.24: The Anthropic Agent Package Is Stable, Except for Beta Services

Microsoft.Agents.AI.Anthropic 1.24.0 drops the preview suffix and depends on Anthropic 12.53.0. Agents built from IAnthropicClient are now stable API, while the client.Beta extensions are marked experimental under MAAIANTHROPIC001, which extension-method calls do not trigger.

2026-10-08 migration flutter impeller

Migrate a Flutter Windows or Linux desktop app to Impeller (Flutter 3.47)

Flutter 3.47 makes Impeller the default renderer on Windows and Linux. What actually changes underneath (it is still OpenGL ES, not Vulkan), how to A/B test against Skia on a built binary, a per-machine kill switch for release builds, and why your golden tests will not notice.

2026-10-08 migration flutter dart

Migrate custom page transitions after the Flutter page transition builders reorganization (Flutter 3.44 to 3.47)

Flutter moved PageTransitionsBuilder and two built-in builders into the widgets layer and CupertinoPageTransitionsBuilder out of Material. What actually breaks (one import, with a misleading 'Not a constant expression' error), what dart fix does and gets wrong for material_ui projects, and how to rewrite custom builders and routes so they no longer depend on Material at all.

2026-10-08 ai-agents github-copilot claude-code

What Is GitHub Agentic Workflows, and How Is It Different From GitHub Actions?

GitHub Agentic Workflows (gh-aw v0.91.5) compiles a Markdown file into a hardened GitHub Actions .lock.yml that runs Copilot, Claude Code, Codex, Gemini or Pi in a read-only, firewalled job and applies writes through safe-outputs. What it adds on top of Actions, the jobs it generates, and when a plain workflow with claude-code-action is still the better tool.

2026-10-07 vscode csharp dotnet-11

C# Dev Kit 11.0 Collapses Six Processes Into One Native AOT Binary

C# Dev Kit 11.0 pre-release replaces six managed processes with a single Native AOT CSDevKit process and a persistent project cache. A 407-project Aspire solution is ready in 3.0s instead of 84.1s, using 316 MB instead of 2,072 MB.

2026-10-07 errors dotnet testing

Fix: dotnet test falls back to VSTest in a Linux CI pipeline even though the project uses Microsoft.Testing.Platform

dotnet test picks its runner from global.json found by walking up from the working directory. On Linux CI it falls back to VSTest when that file is missing, misnamed, has a mis-cased key, or the SDK is older than 10.

2026-10-07 errors flutter android

Fix: Bad state: No suitable NDK found for target architecture arm64 in a Flutter build

The android_libcpp_shared build hook (0.2.0 and older) cannot find your NDK, or your minSdk is above the NDK's newest API. Upgrade to 0.2.1+, or install an NDK that covers your minSdk.

2026-10-07 comparison redis aspnetcore

Redis key prefix vs separate database vs separate instance for multi-tenant caching in ASP.NET Core

Use a tenant key prefix on one shared Redis for almost every multi-tenant ASP.NET Core app, move only tenants with contractual isolation or noisy workloads to their own instance, and skip numbered databases: Redis Cluster, Azure Managed Redis and Redis Cloud only have database 0.

2026-10-07 microsoft-agent-framework ai-agents llm

What Is the Agent Harness in Microsoft Agent Framework

The Agent Harness is Microsoft Agent Framework's batteries-included runtime: one call (AsHarnessAgent in .NET, create_harness_agent in Python) wraps any chat client in a tool loop with todos, plan/execute modes, file memory, tool approval, compaction and OpenTelemetry. Here is what it actually sends to the model on Microsoft.Agents.AI.Harness 1.23.0, what it costs per call, and how to trim it.

Page 1 of 98 Next ›