</p>

In software engineering, a design pattern is a general repeatable solution to a commonly occurring problem in software design.

In software engineering, a design pattern is a general, repeatable solution to a commonly occurring problem in software design.

A design pattern isn't a finished design that can be transformed directly into code.

It is a description or template for how to solve a problem that can be used in many different situations.

In addition, design patterns allow developers to communicate using well-known, wellunderstood names for software interactions.

In addition, design patterns allow developers to communicate using well-known, well-understood names for software interactions.

Know when to use a certain design pattern, and when not to.

No design pattern is a 42 - the answer to life, the universe and everything. There are situations in which every design pattern easily becomes an antipattern.

No design pattern is a 42 - the answer to life, the universe, and everything. There are situations in which every design pattern easily becomes an antipattern.

Design patterns can be separated into three main categories:

* Behavioral

This repository contains a comprehensive design patterns library implemented in C#, which covers various design patterns from the most commonly used ones (Gang of Four) to the lesser-known ones. It enables you to get familiar with and learn design patterns through moderately realistic examples.

| Design Pattern | Type | Description | Introduction |

The solution contains one executable project called `DesignPatternsLibrary`.\

Run the solution and you will get a menu from which you can choose a design pattern.

You can just run the solution, and you will be presented with a menu from which you can choose a design pattern.

<img src="assets/images/console-menu.png" width="600"/>

Compare the output from the console with the code for the chosen design pattern.\

Repeat!

The solution can be run using either `.NET 5` (choose .NET 5 [branch](https://github.com/nemanjarogic/DesignPatternsLibrary/tree/dotnet-5) or [release](https://github.com/nemanjarogic/DesignPatternsLibrary/releases/tag/v5.0.0)) or `.NET 6` (the default option).

The solution is configured to use `.NET 8` as the default option. However, if for some reason you want to use older versions, `.NET 5` and `.NET 6` are supported via branches or releases.

For learning more about design patterns, I highly recommend:

- Visiting [Refactoring.Guru](https://refactoring.guru/) website for amazing content about design patterns

- Reading the `Head First Design Patterns: A Brain-Friendly Guide` book

- Watching courses about design patterns available on various learning platforms. The idea for this repository has been born after watching [Design Patterns Library course](https://www.pluralsight.com/courses/patterns-library) created by `Steve Smith, Robert Horvick, Brian Lagunas, David Starr, Keith Sparkjoy, Niraj Bhatt, Glenn Block, Scott Allen, John Brown and Donald Belcham`.

- Watching courses about design patterns available on various learning platforms. The idea for this repository was born after watching [Design Patterns Library course](https://www.pluralsight.com/courses/patterns-library) created by `Steve Smith, Robert Horvick, Brian Lagunas, David Starr, Keith Sparkjoy, Niraj Bhatt, Glenn Block, Scott Allen, John Brown and Donald Belcham`.

- Visiting blogs like [ExceptionNotFound](https://exceptionnotfound.net/), [Ardalis](https://ardalis.com/blog) or [Enterprise Craftsmanship](https://enterprisecraftsmanship.com/posts)

The examples that are used to demonstrate design patterns usage are a mix of my own ideas and ideas adapted from various resources (some of them are mentioned above).

The examples that are used to demonstrate design patterns usage are a mix of my ideas and ideas adapted from various resources (some of them are mentioned above).