Why does this skill emphasize interface-based injection?

Depending on interfaces rather than concrete classes allows for easier unit testing through mocking and enables switching implementations without changing the consuming code.

Does this skill support the latest .NET 8 features?

Yes, it specifically includes patterns for .NET 8 Keyed Services, allowing you to register multiple implementations of the same interface using unique keys.

How does this skill handle Captive Dependency errors?

It provides code patterns using IServiceProvider and AsyncServiceScope to safely resolve Scoped services within Singleton instances without leaking state.

What are the three DI lifetimes in .NET supported by this skill?

The skill covers Singleton (created once per application), Scoped (created once per HTTP request), and Transient (created every time they are requested).

.NET Dependency Injection Patterns

Name: .NET Dependency Injection Patterns
Author: andychang0121

byandychang0121

0•

API Development

Implements ASP.NET Core dependency injection best practices to ensure scalable and bug-free service architectures.

This skill provides expert guidance on managing Dependency Injection (DI) in ASP.NET Core applications, focusing on proper service lifetime management and architectural integrity. It helps developers correctly utilize Singleton, Scoped, and Transient lifetimes, while providing specific patterns to avoid the common 'Captive Dependency' error—where long-lived services hold short-lived ones. Additionally, it covers modern .NET 8 features like Keyed Services and enforces the principle of depending on interfaces rather than concrete implementations to enhance testability and maintainability.

Key Features

01Implementation patterns for .NET 8 Keyed Services and dynamic resolution

020 GitHub stars

03Comprehensive guidance on Singleton, Scoped, and Transient lifetimes

04Standardized service registration extension methods for cleaner Program.cs files

05Strategies to detect and resolve Captive Dependency errors using IServiceProvider

06Best practices for DbContext and Repository pattern registration

Use Cases

01Accessing Scoped services within Singleton background tasks or caches

02Implementing multiple strategy patterns using .NET 8 Keyed Services

03Designing robust service registration logic in ASP.NET Core web APIs

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add andychang0121/dotnet-skills dotnet-di-patterns

For use in Claude.ai and ChatGPT

Key Features

01Implementation patterns for .NET 8 Keyed Services and dynamic resolution

020 GitHub stars

03Comprehensive guidance on Singleton, Scoped, and Transient lifetimes

04Standardized service registration extension methods for cleaner Program.cs files

05Strategies to detect and resolve Captive Dependency errors using IServiceProvider

06Best practices for DbContext and Repository pattern registration

Use Cases

01Accessing Scoped services within Singleton background tasks or caches

02Implementing multiple strategy patterns using .NET 8 Keyed Services

03Designing robust service registration logic in ASP.NET Core web APIs

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add andychang0121/dotnet-skills dotnet-di-patterns

For use in Claude.ai and ChatGPT