https://www.lukaswalter.dev/tags/c%23/ Recent content in C# on lukaswalter.dev https://www.lukaswalter.dev/images/LW%20Dev%20Thumbnail.png https://www.lukaswalter.dev/images/LW%20Dev%20Thumbnail.png Hugo -- 0.150.0 en Sun, 05 Jul 2026 00:00:00 +0000 https://www.lukaswalter.dev/tips/assign-least-privilege-azure-roles-not-broad-contributor-rights/ Sun, 05 Jul 2026 00:00:00 +0000 https://www.lukaswalter.dev/tips/assign-least-privilege-azure-roles-not-broad-contributor-rights/ Give workloads and people the narrow Azure role they need instead of defaulting to Contributor. https://www.lukaswalter.dev/tips/avoid-hidden-allocations-in-hot-paths/ Sun, 05 Jul 2026 00:00:00 +0000 https://www.lukaswalter.dev/tips/avoid-hidden-allocations-in-hot-paths/ Watch for small per-item allocations inside loops, parsers, serializers, and request paths. https://www.lukaswalter.dev/tips/do-not-hide-exceptions-inside-fire-and-forget-tasks/ Sun, 05 Jul 2026 00:00:00 +0000 https://www.lukaswalter.dev/tips/do-not-hide-exceptions-inside-fire-and-forget-tasks/ If work can fail, give it ownership, logging, cancellation, and a lifecycle. https://www.lukaswalter.dev/tips/expose-a-python-fastapi-ai-tool-as-an-aspire-service/ Sun, 05 Jul 2026 00:00:00 +0000 https://www.lukaswalter.dev/tips/expose-a-python-fastapi-ai-tool-as-an-aspire-service/ Keep Python AI code behind an HTTP boundary and let Aspire wire it into the local system. https://www.lukaswalter.dev/tips/keep-model-name-and-deployment-name-in-config/ Sun, 05 Jul 2026 00:00:00 +0000 https://www.lukaswalter.dev/tips/keep-model-name-and-deployment-name-in-config/ Do not hard-code model routing decisions into application logic. https://www.lukaswalter.dev/tips/keep-vector-search-filters-separate-from-semantic-ranking/ Sun, 05 Jul 2026 00:00:00 +0000 https://www.lukaswalter.dev/tips/keep-vector-search-filters-separate-from-semantic-ranking/ Use filters for eligibility and ranking for relevance instead of blending both concerns. https://www.lukaswalter.dev/tips/measure-before-you-optimize/ Sun, 05 Jul 2026 00:00:00 +0000 https://www.lukaswalter.dev/tips/measure-before-you-optimize/ Use traces, counters, profiles, and focused benchmarks before changing code for performance. https://www.lukaswalter.dev/tips/middleware-order-is-important/ Sun, 05 Jul 2026 00:00:00 +0000 https://www.lukaswalter.dev/tips/middleware-order-is-important/ Place ASP.NET Core middleware in the order that matches routing, security, and endpoint behavior. https://www.lukaswalter.dev/tips/nullable-warnings-are-design-feedback-not-noise/ Sun, 05 Jul 2026 00:00:00 +0000 https://www.lukaswalter.dev/tips/nullable-warnings-are-design-feedback-not-noise/ Treat nullable warnings as pressure to make object state and API contracts clearer. https://www.lukaswalter.dev/tips/pass-cancellationtoken-through-real-boundaries/ Sun, 05 Jul 2026 00:00:00 +0000 https://www.lukaswalter.dev/tips/pass-cancellationtoken-through-real-boundaries/ Thread cancellation through every expensive operation instead of dropping it mid-chain. https://www.lukaswalter.dev/tips/prefer-health-checks-that-test-dependencies-deliberately/ Sun, 05 Jul 2026 00:00:00 +0000 https://www.lukaswalter.dev/tips/prefer-health-checks-that-test-dependencies-deliberately/ Health checks should say something useful about readiness without turning every probe into production load. https://www.lukaswalter.dev/tips/prefer-keyset-pagination-for-deep-lists/ Sun, 05 Jul 2026 00:00:00 +0000 https://www.lukaswalter.dev/tips/prefer-keyset-pagination-for-deep-lists/ Use seek-based pagination when users move through large ordered result sets. https://www.lukaswalter.dev/tips/separate-prompts-from-authorization/ Sun, 05 Jul 2026 00:00:00 +0000 https://www.lukaswalter.dev/tips/separate-prompts-from-authorization/ Do not let prompt instructions decide what data or actions a user is allowed to access. https://www.lukaswalter.dev/tips/start-independent-tasks-before-awaiting/ Sun, 05 Jul 2026 00:00:00 +0000 https://www.lukaswalter.dev/tips/start-independent-tasks-before-awaiting/ Create unrelated asynchronous operations first, then await them together. https://www.lukaswalter.dev/tips/use-approval-for-side-effects-not-for-every-tool-call/ Sun, 05 Jul 2026 00:00:00 +0000 https://www.lukaswalter.dev/tips/use-approval-for-side-effects-not-for-every-tool-call/ Reserve human approval for actions where a wrong call would actually matter. https://www.lukaswalter.dev/tips/use-file-based-csharp-apps-for-small-repo-utilities/ Sun, 05 Jul 2026 00:00:00 +0000 https://www.lukaswalter.dev/tips/use-file-based-csharp-apps-for-small-repo-utilities/ Use a single C# file when a repo utility is useful but a full project would be ceremony. https://www.lukaswalter.dev/tips/use-hybridcache-when-cache-stampedes-matter/ Sun, 05 Jul 2026 00:00:00 +0000 https://www.lukaswalter.dev/tips/use-hybridcache-when-cache-stampedes-matter/ Use HybridCache for expensive shared lookups where many callers can miss at once. https://www.lukaswalter.dev/tips/use-managed-identity-before-connection-strings/ Sun, 05 Jul 2026 00:00:00 +0000 https://www.lukaswalter.dev/tips/use-managed-identity-before-connection-strings/ Prefer Azure-managed identities over long-lived secrets in deployed applications. https://www.lukaswalter.dev/tips/use-opentelemetry-before-you-need-production-debugging/ Sun, 05 Jul 2026 00:00:00 +0000 https://www.lukaswalter.dev/tips/use-opentelemetry-before-you-need-production-debugging/ Add traces, metrics, and logs while the system is still easy to reason about. https://www.lukaswalter.dev/tips/use-problemdetails-as-your-api-error-contract/ Sun, 05 Jul 2026 00:00:00 +0000 https://www.lukaswalter.dev/tips/use-problemdetails-as-your-api-error-contract/ Return one predictable error shape instead of inventing a new JSON format for every failure.