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dotnet-9

6 articles tagged with “dotnet-9”

.d.ts A/B-testing ACR AI AI-Search APE API-gateway API-providers APM ASP.NET-Core Alertmanager Anthropic Anthropic-API Arize AutoGen Azure-APIM Azure-OpenAI Bedrock Bundler CI Capitalize Claude CoT Copilot Cosmos-DB Cursor DORA DSPy DeepEval DefinitelyTyped Docker-Hub Event-Grid FinOps GHCR GPT GPT-6 GPU Gemini Gemma GitFlow GitHub Google-DeepMind Groq GroupChat HPA Helm ICL Istio JSON JSON-mode KV cache Kubernetes LLM LLM-as-judge LLM-monitoring LLM-security LangChain LangGraph LangSmith Linkerd Llama MCP MTEB Mistral Model-Context-Protocol Node16 OIDC OPRO OTEL OWASP Omit OpenAI OpenAI-API OpenTelemetry Outlines P99 PII PII-filtering PagerDuty Partial Phi Phoenix Pick Pinecone Promptfoo Qdrant RAG RAG-evaluation RAGAS ReAct Record Responses-API SDK SLI SLM SLO Semantic-Kernel Service-Bus TC39 TTFT ToT Vertex-AI WebLLM Windsurf a-star adaptive-thinking agents aggregation ai ai-gateway aks alerting algorithms api-design api-gateway api-versioning apim app-router app-service appsec architecture arm-templates aspnet-core aspnetcore assertion-functions asserts async audit authentication authorization automation azure azure-content-safety azure-front-door azure-functions azure-openai azure-policy azure-storage batch-API bdd beam search benchmarks best-practices bfs bi-encoder bias-detection bicep binary-search branching bst cache-components caching cap-theorem capability-tagging cascading case-based-reasoning chain-of-thought charts chatbot checkpointing chunking ci-cd ci-optimization cicd class-decorator clean-architecture cloud cloud-security cloudevents code-review coding-agents comparison compilerOptions compliance compose concurrency concurrent-rendering conditional-types consistency consistent-hashing constrained-generation constraints consumer-driven container-registry containers content-moderation content-safety context context-compression context-window contract-testing conversational-agents cosmos-db cost-allocation cost-control cost-optimization cost-per-task cost-performance coverage cqrs cross-session csharp cve cypress dapper dashboards dast data-fetching databases dataloader datasets ddd decision-framework declaration-files decorators dependency-injection dependency-scanning deployment-slots deployments deprecation design-patterns devops dfs dijkstra discriminated-unions distributed-tracing distributive docker documentation dotnet dotnet-9 drift-detection dynamic-discovery dynamic-programming e2e-testing edge AI ef-core ef-core-9 embeddings engineering environments episodic-memory error-budget evals evaluation event-driven event-grid event-hubs eventing examples experience-replay experimentalDecorators factuality fail-fast faithfulness feature-flags federation few-shot fiber fine-tuning flaky-tests flex-consumption frontend function-calling garak gen-ai-semantic-conventions generics git github-actions goal-decomposition golden-signals gpt-4o grammar graph graphql grounding grpc guardrails hallucination hallucination-detection harmful-content hcl health-checks heap hooks hotchocolate http http2 http3 hybridcache iac idempotency identity image-scanning in-context-learning incident-response indexes infer inference infrastructure input-validation integration integration-testing introsort invariant isolation jailbreak jest joins jotai jsonb jwt k8s key-remapping key-vault kiota knapsack knowledge-base kubernetes language latency legacy-code linq llama.cpp load-balancing long-term-memory lost-in-the-middle lower-bound mTLS managed-identity mapped-types materialized-views memoization memory memory-consolidation merge message-queue messaging meta-prompting metadata metrics microservices microsoft minimal-apis mocking mocks model-routing model-selection moderation module-augmentation module-resolution modules mongodb monitoring msw multi-agent multi-stage-builds multi-tenant multimodal mvcc narrowing network-security nextjs-16 normalization nosql oauth oauth2 observability offline-evals oidc on-call on-device online-evals opa open-source open-weight openapi orchestration output-format output-validation owasp paas package-exports pact pactflow page-objects parsing partitioning paths pattern-matching performance personal-AI pgvector pinecone pipeline planning playwright plugins policy-as-code polly postgresql pricing production production-monitoring project-references prompt injection prompt optimisation prompt-caching prompt-design prompt-engineering prompt-injection promptfoo protobuf pulumi python quality quality-gates quality-score quantization queues rag rate-limiting react react-19 react-compiler react-internals react-query react-server-components realtime reasoning reasoning-effort recursion recursive-types red teaming red-black red-green-refactor red-teaming redis regression-testing release-management replanning resource-limits rest reusable-workflows rls rolling-updates runtime-safety saga-pattern sast sbom scale schema schema-design schema-validation sdlc search secrets-management security security-testing self-consistency self-hosting semantic-similarity serializable server-actions serverless service-bus service-mesh sharding shortest-path sidecar-proxy signalr snapshot-testing software-design sorting spies sql stability state-graph state-management streaming streams strict-mode stride string-types structured-output stubs summarisation supertest supply-chain system-design tail-call tanstack-query task-framing tdd template-literals templates terraform test-architecture test-doubles test-pyramid testcontainers testing testing-patterns testing-strategy threat-modeling token-bucket token-budget token-economics token-limit token-masking token-tracking tokens tokens-per-second tool-calling tool-registry tool-use topological-sort toxicity tracing trajectory transactions tree-of-thought trees trie trunk-based tsconfig type-guards type-narrowing type-predicates type-safe-routes type-system type-transforms types typescript unit-testing usage-metrics user-feedback utility-types vLLM validation valkey values vault vector-db vector-search vector-store vendor-neutral version-control versioning visual-regression vitest vulnerabilities weaviate web-api web-security websockets window-functions wiremock working-memory workload-identity workspaces xunit yarp zero-shot zero-trust zod zustand

Backend (.NET / C#)

Seven copy-pasted numeric helpers replaced by one generic Sum constrained to INumber, which the JIT specialises per value type without boxing, with a wider accumulator to avoid silent integer overflow.

C# Generics Mastery: Constraints, Variance, and Generic Math in .NET 9

Type-safe abstractions without overhead — constraints, covariance/contravariance, INumber<T>, and the .NET 9 "allows ref struct" anti-constraint.

02 AprUpdated 30 Aug 202612 min

Backend (.NET / C#)

Where LINQ work happens: on IQueryable, Where, Select and GroupBy become SQL; once the query is IEnumerable they run in memory over everything fetched, and a deferred query enumerated twice runs twice.

LINQ in .NET 9: Deferred Execution, IQueryable, and the New Operators

Practical LINQ for backend engineers — IEnumerable vs IQueryable, the .NET 9 CountBy/AggregateBy/Index additions, and EF Core translation pitfalls.

04 AprUpdated 23 Sep 202613 min

Backend (.NET / C#)

Thread-pool starvation from blocking on async code: .Result holds threads while waiting on I/O so requests queue; the fix is async all the way, cancellation tokens passed through, and bounded concurrency for fan-out.

Async/Await in .NET 9: ConfigureAwaitOptions, Task.WhenEach, and Bounded Concurrency

Modern async patterns for ASP.NET Core — context capture, the .NET 8 ConfigureAwaitOptions enum, .NET 9 Task.WhenEach, and the anti-patterns that cause production incidents.

06 AprUpdated 22 Sep 202614 min

Backend (.NET / C#)

DI lifetimes in ASP.NET Core: singletons live for the app, scoped services per request and transients per resolve; a singleton must not hold a scoped DbContext, background services create their own scope, and scope validation catches mistakes at startup.

Dependency Injection in .NET 9: Lifetimes, Keyed Services, and the Scope Pattern

Lifetime selection, keyed services (.NET 8+), the BackgroundService scope pattern, and the four DI anti-patterns that cause production bugs.

08 AprUpdated 05 Aug 202612 min

Backend (.NET / C#)

CQRS as a code split: commands load the aggregate, apply rules and save; queries project straight from the same database into one DTO per screen; handlers are called directly without a mediator, and a separate read store is optional.

CQRS in .NET Without the Cargo Cult: A Practical Guide for 2026

CQRS as a folder discipline, command/query handlers without MediatR, vertical slice architecture, and when eventual consistency is overkill.

18 AprUpdated 13 Oct 202615 min

Backend (.NET / C#)

A production Minimal API: endpoints organised in route groups, endpoint filters validate input, handlers return TypedResults so OpenAPI documents every response, and Native AOT with source-generated JSON gives fast cold starts.

Minimal APIs in .NET 9: Typed Results, Route Groups, and Endpoint Filters Done Right

Production-shaped Minimal APIs with typed Results<T>, route groups, endpoint filters, [FromKeyedServices], and the new built-in OpenAPI replacing Swashbuckle.

25 AprUpdated 02 Oct 202613 min