ASP.NET Core Best Practices

What this best practices guide is

A practical guide to ASP.NET Core best practices for developers building web APIs on .NET. It covers supported versions and project setup, dependency injection lifetimes and validated options, minimal APIs with built-in validation and OpenAPI, problem details errors, the async rules that prevent thread pool starvation, efficient EF Core queries, security and rate limiting, and testing and running in production.

It has 8 chapters and 30 practices, each with why it matters, what to do and what to avoid. For .NET backend developers.

Chapter by chapter

1. Versions and project setup (3 practices)

Which .NET version to run, and the compiler and package settings that catch bugs before they reach a pull request.

2. Dependency injection and configuration (4 practices)

Choosing the right service lifetime, binding settings into validated options and keeping secrets out of appsettings.json.

3. Endpoints, validation and OpenAPI (4 practices)

How to shape endpoints with minimal APIs or controllers, validate input with the .NET 10 validation support and publish an accurate OpenAPI document.

4. Errors and problem details (4 practices)

How to return one consistent error format, handle exceptions in one place and keep exception details out of production responses.

5. Async code and performance (5 practices)

The rules from the ASP.NET Core best practices article that prevent thread pool starvation, crashes and memory pressure under load.

6. Data access with EF Core (4 practices)

Query patterns from the EF Core performance guidance that keep data access fast as tables grow.

7. Security and rate limiting (3 practices)

Authentication and authorization defaults, HTTPS, CORS and rate limits for public APIs.

8. Testing and running in production (3 practices)

Integration tests with the real pipeline, structured logging, health checks and telemetry for the API once it is live.

How it works on Sefism

The guide reads like a short course: a syllabus, then one chapter per page in a focused reader, with a quiz at the end of each chapter for members. The opening chapters are open to everyone. Adding it to your account uses credits, opens every chapter and keeps your progress.

Every claim is checked against the sources listed on the page (8 cited).