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Production Anti-Patterns

The mistakes that pass code review and break production. Anti-patterns in performance, concurrency, resilience, configuration, and testing.

EF Core Performance Mistakes That Ship to Production

Part 1 · Jan 11, 2026 · 12 min read

The N+1 queries, missing projections, and tracking overhead that pass code review and slow down production systems.

  • ASP.NET Core
  • Performance
  • EF Core
  • .NET

Dependency Injection Anti-Patterns in ASP.NET Core

Part 2 · Jan 11, 2026 · 12 min read

The 5 DI anti-patterns that pass code review: service locator, captive dependencies, over-injection, disposable transients, and lifetime mismatches.

  • ASP.NET Core
  • Architecture
  • Best Practices
  • C#

Concurrency Anti-Patterns: The Race Conditions That Ship

Part 3 · Jan 12, 2026 · 13 min read

Race conditions, deadlocks, and thread-safety bugs that pass code review: shared state mutations, fire-and-forget hazards, and lock misuse.

  • ASP.NET Core
  • Performance
  • Best Practices
  • C#

Resilience Anti-Patterns: The Missing Retries That Cause Outages

Part 4 · Jan 11, 2026 · 14 min read

The 6 resilience mistakes that turn transient failures into outages: missing retries, retry storms, broken circuit breakers, no timeouts, and missing fallbacks.

  • ASP.NET Core
  • Architecture
  • Best Practices

Configuration Anti-Patterns: Secrets in Logs and Other Production Fires

Part 5 · Jan 11, 2026 · 16 min read

The 6 configuration mistakes that cause production incidents: secrets in logs, missing validation, hardcoded values, environment leakage, and insecure defaults.

  • ASP.NET Core
  • Security
  • Best Practices

Testing Anti-Patterns: The Flaky Tests That Cry Wolf

Part 6 · Jan 11, 2026 · 17 min read

The 6 testing mistakes that erode confidence: flaky tests, missing integration coverage, poor isolation, test pollution, brittle assertions, and slow test suites.

  • ASP.NET Core
  • Best Practices
  • Testing

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