csharp-design-patterns

Implement 10 Gang of Four design patterns in .NET 8 with C# 12 and Dependency Injection.

Updated Feb 21, 2026
One-click install
npx skills add https://github.com/AndyHsuTW/everything-llm-workspace --skill csharp-design-patterns
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Skill: csharp-design-patterns
Source: https://github.com/AndyHsuTW/everything-llm-workspace/tree/main/.github/skills/csharp-design-patterns
Command: npx skills add https://github.com/AndyHsuTW/everything-llm-workspace --skill csharp-design-patterns

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

This Skill provides clear, modern implementations of essential C# design patterns, helping developers write more robust, maintainable, and scalable .NET applications.

Core Features & Use Cases

  • GoF Pattern Implementations: Covers 10 high-frequency Gang of Four patterns.
  • Modern .NET Idioms: Emphasizes Dependency Injection (DI) and current .NET best practices.
  • Use Case: Understand and apply the Singleton pattern correctly using .NET's built-in DI container for managing shared resources like caches or configuration services.

Quick Start

Show me the C# code for the Singleton design pattern using Dependency Injection in .NET 8.

Frequently Asked Questions about csharp-design-patterns

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I implement the Singleton design pattern using Dependency Injection in .NET 8?

You can implement the Singleton design pattern in .NET 8 by registering your service with the built-in Dependency Injection container using the AddSingleton method. This manages shared resources like caches or configuration services correctly within ASP.NET Core.

What are the most common Gang of Four design patterns for modern C# development?

The most common Gang of Four design patterns for modern C# include 10 high-frequency creational, structural, and behavioral patterns. They provide clear implementations to help developers write robust, maintainable, and scalable .NET applications.

When should I use Dependency Injection-based design patterns in ASP.NET Core?

You should use Dependency Injection-based design patterns in ASP.NET Core when developing libraries or applications that require modern .NET idioms. This approach ensures proper dependency management and avoids common anti-patterns.

What are the anti-patterns to avoid when applying GoF patterns in C#?

Anti-patterns to avoid when applying GoF patterns in C# include bypassing the built-in Dependency Injection container or using outdated implementation techniques. The skill explains these limitations to help you maintain current .NET best practices.

Can I use C# 12 features to implement structural and behavioral design patterns?

Yes, you can use C# 12 features to implement structural and behavioral design patterns. The implementations focus on modern .NET 8 and C# 12 idioms, ensuring your software architecture leverages current language capabilities.

Why does modern .NET prefer Dependency Injection over traditional design pattern implementations?

Modern .NET prefers Dependency Injection over traditional implementations because it provides built-in lifecycle management and decouples dependencies. This approach aligns with current best practices for scalable ASP.NET Core and library development.