microsoft-extensions-dependency-injection

SKILL.md

Dependency Injection Patterns

When to Use This Skill

Use this skill when:

Organizing service registrations in ASP.NET Core applications

Avoiding massive Program.cs/Startup.cs files with hundreds of registrations

Making service configuration reusable between production and tests

Designing libraries that integrate with Microsoft.Extensions.DependencyInjection

The Problem

Without organization, Program.cs becomes unmanageable:

// BAD: 200+ lines of unorganized registrations
var builder = WebApplication.CreateBuilder(args);