C# Production Toolkit

Created by CodeCraft LLCv2.0.0 · updated 2026-10-16

The four skills a C# developer needs to ship production .NET - the language done right, ASP.NET Core APIs, EF Core data access and tests you can trust.

C# developers who have learned the language and are now building real applications - ASP.NET Core APIs, background services, EF Core data layers. These skills address the problems you hit daily: async deadlocks, captive dependencies, slow or untranslatable LINQ, fragile error handling, NullReferenceExceptions, N+1 queries and brittle tests.

Each skill pairs a compact set of rules and a review checklist with deep-dive references the agent reads when the task calls for them - async/await, dependency injection, exceptions and Polly v8, LINQ, nullable reference types and SOLID in `csharp`; worked xUnit and Moq patterns in `dotnet-testing`. Together they cover the path from first endpoint to a tested, reviewed production service.

$35.00 value$36.00 as single downloads4 skills · included with your subscription

Product and technology names are trademarks of their respective owners, used only to identify what these skills cover. CodeCraft LLC is not affiliated with or endorsed by them.

languagesDownload

C# & .NET best practices

Write, advise on, and review C# and .NET code

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backendDownload

Building ASP.NET Core APIs & apps

Build, advise on, and review ASP.NET Core web APIs and apps

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backendDownload

EF Core data access & review

Build, advise on, and review Entity Framework Core data access

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testingDownload

.NET testing

Write, advise on, and review .NET tests

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Changelog

v2.0.0Oct 16, 2026Latest

Changed

Rebuilt around four published skills: csharp, aspnet-core, ef-core and dotnet-testing.
The async/await, dependency injection, exception handling, LINQ, nullable reference types and SOLID material now lives as deep-dive references inside csharp; the xUnit and Moq material lives inside dotnet-testing.

Removed

The seven separate skills csharp-async-await, csharp-solid-principles, csharp-dependency-injection, csharp-linq, csharp-exception-handling, csharp-unit-testing and csharp-nullable (merged as above).

v1.0.0Oct 16, 2026

Added

Initial release with seven skills covering the full C# production readiness arc.
csharp-async-await: async/await patterns and pitfalls, ConfigureAwait, CancellationToken, parallel async.
csharp-solid-principles: SOLID principles with C# before/after examples and code review checklist.
csharp-dependency-injection: DI lifetimes, Options pattern, keyed services, WebApplicationFactory testing.
csharp-linq: deferred execution, EF LINQ translation, projections, compiled queries.
csharp-exception-handling: exception layering, Polly v8 retry and circuit breaker pipelines, ProblemDetails.
csharp-unit-testing: xUnit, Moq strict mocks, FluentAssertions, AutoFixture, EF Core in-memory testing.
csharp-nullable: NRT enabling, CS8618/CS8602/CS8603 fixes, nullable attributes, migration strategy.