---
title: "12 Rules for Dependency Injection in ASP.NET Core"
url: https://daily.dev/posts/12-rules-for-dependency-injection-in-asp-net-core-nirfrs5ef
source_url: https://codingsonata.com/12-rules-for-dependency-injection-in-asp-net-core
type: article
source: "We Are .NET"
published: 2026-06-10T09:41:44.148Z
updated: 2026-06-10T09:42:10.589Z
tags: [".net", "c#", "aspnet", "dependency-injection"]
reading_time: 6
upvotes: 3
comments: 1
language: en
---

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# 12 Rules for Dependency Injection in ASP.NET Core

**[We Are .NET](https://daily.dev/sources/wearedotnet)** · 6 min read · 3 upvotes · 1 comments

## Summary

A practical guide covering 12 rules for using dependency injection effectively in ASP.NET Core. Topics include choosing the right service lifetime (Transient, Scoped, Singleton), injecting interfaces over concrete types, avoiding lifetime mismatches like injecting transient services into singletons, using IServiceScopeFactory for background services, organizing registrations with extension methods, enabling startup validation, avoiding the service locator pattern, preventing circular dependencies, and using IOptions for strongly typed configuration.

## Full article

daily.dev links to this article rather than hosting it. Read it at the original source: <https://codingsonata.com/12-rules-for-dependency-injection-in-asp-net-core>

## Community discussion

Top comments from developers on daily.dev.

**@alejovillores** · 0 upvotes

> Nice to have always in mind. Specially the scoped services inside singletons background services

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---

Tags: [#.net](https://daily.dev/tags/.net), [#c#](https://daily.dev/tags/c#), [#aspnet](https://daily.dev/tags/aspnet), [#dependency-injection](https://daily.dev/tags/dependency-injection)

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