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Tag: dotnet

374 posts · Page 6 of 38

2026-08-07 comparison dotnet aspnetcore

WebApplicationFactory vs Testcontainers for ASP.NET Core integration tests

They are not alternatives. WebApplicationFactory boots your app, Testcontainers boots your dependencies. Measured on .NET SDK 10.0.201: a container fixture costs 1.7 s per class against 10 ms for SQLite, and a HasMaxLength(16) violation that Postgres rejects with 22001 is silently accepted by SQLite.

2026-08-07 comparison testing xunit

xUnit v3 vs NUnit vs MSTest in 2026: which should you pick?

Pick xUnit v3 for greenfield .NET projects, NUnit 4.6 if you live in its constraint model, MSTest 4 if you already ship it. A measured comparison on .NET SDK 10.0.201 covering parallelism defaults, test class lifecycle, assertion failure output, and the Microsoft.Testing.Platform version conflict that breaks the NUnit runner.

2026-08-06 comparison dotnet dotnet-11

gRPC vs REST vs SignalR for service-to-service calls in .NET 11

For internal service-to-service calls in .NET 11, default to gRPC when you own both ends of the contract and the call is point-to-point. Use REST with JSON when anything you do not control has to call the service. SignalR is not an RPC transport between services: reach for it only when one producer has to fan a message out to many long-lived consumers.

2026-08-05 comparison microsoft-agent-framework ai-agents

Declarative YAML Workflows vs Code-First Orchestration in Microsoft Agent Framework

Use declarative YAML when the graph is a sequential routing decision that non-developers change often. Use code-first WorkflowBuilder the moment you need parallelism, custom executors, or a non-Foundry agent. Here is the decision, the action catalog limits, and the code both ways.

2026-08-05 errors csharp dotnet

Fix: AggregateException "One or more errors occurred" when awaiting Task.WhenAll in C#

await Task.WhenAll rethrows only one of the failures. Keep the WhenAll task in a variable and read its Exception.InnerExceptions to see every error instead of one.

2026-08-05 errors csharp csharp-14

Fix: CS1998 "This async method lacks 'await' operators and will run synchronously" in C#

CS1998 means an async method has no await, so it runs synchronously. Drop the async modifier and return Task.FromResult, or add the await you forgot.

2026-08-05 errors dotnet dotnet-11

Fix: HTTP Error 500.30 - ASP.NET Core app failed to start after deploying to IIS

500.30 means your app threw during startup inside w3wp.exe. The real exception is already in the Windows Application event log under IIS AspNetCore Module V2. Read that first, then rank the fix: missing shared framework, x86/x64 app pool mismatch, missing config, or app pool permissions.

2026-08-05 dotnet csharp ai

Live Speech-to-Text in C# with Foundry Local: A 0.67 GB Model and No Cloud Call

The .NET blog shipped a live microphone transcription sample on August 4, 2026 using Foundry Local and nemotron-speech-streaming-en-0.6b. Here is the session API, the PCM backpressure trap, and which NuGet package to pick.

2026-08-04 dotnet nuget ci-cd

NuGet API Keys Get a 30-Day Cap on August 17, and Every Old Key Expires November 1

NuGet.org drops the 365-day API key option on August 17, 2026, caps new keys at 30 days, and expires every key created before that date on November 1. Here is what breaks and how to move a publish workflow to OIDC trusted publishing.

2026-08-03 agent-framework github-copilot ai-agents

Agent Framework's Copilot Provider Turns the Copilot CLI Into a Plain AIAgent

Microsoft.Agents.AI.GitHub.Copilot 1.16.0 shipped on July 30, 2026. The Copilot CLI runtime now sits behind the ordinary AIAgent abstraction, permissions are deny-by-default, and Squad plugs a whole agent team in as one AIAgent.