{
  "id": 10829928,
  "title": "Getting started with C# SOLID Principles",
  "url": "https://urgent.news/2026/09/30/getting-started-with-c-solid-principles",
  "topic": "tech",
  "section": "Tech",
  "published": "2026-09-30T02:00:55.000Z",
  "source": {
    "name": "Dev.to",
    "slug": "dev-to",
    "url": "https://dev.to/faith_in_errors_/getting-started-with-c-solid-principles-2h44"
  },
  "original_language": "en",
  "account": "The provided code demonstrates an implementation of SOLID principles in a C# application. SOLID is a mnemonic acronym for five design principles used in object-oriented programming: Single Responsibility, Open-Closed, Liskov Substitution, Interface Segregation, and Dependency Inversion.\n\nThe code consists of several classes and interfaces, each adhering to one or more of these principles. The `InstrumentRepository` class implements the `IInstrumentRepository` interface, encapsulating data access logic for instruments. This adheres to the Single Responsibility principle, as it only handles database operations for instruments.\n\nThe `ITaxCalculator` interface and `DefaultTaxCalculator` class demonstrate the Interface Segregation and Dependency Inversion principles. The interface defines a single method for tax calculation, allowing for the creation of multiple tax calculator implementations. The `DefaultTaxCalculator` class implements this interface, providing a specific tax calculation method.\n\nThe `ICsvExporter` interface and `CsvExporter` class showcase the Interface Segregation and Dependency Inversion principles as well. The interface defines a method for exporting instruments to CSV format, enabling the creation of different export implementations. The `CsvExporter` class implements this interface, providing a specific CSV export method.\n\nThe `InstrumentsController` class showcases the Dependency Inversion principle. It depends on the `IInstrumentRepository`, `ICsvExporter`, and `ITaxCalculator` interfaces instead of concrete implementations. This allows for the injection of dependencies via constructor injection, making the controller more flexible and easier to test.\n\nOverall, the code demonstrates a good application of SOLID principles in a C# application, promoting modular, maintainable, and testable code through the use of interfaces, dependency injection, and adherence to each individual principle.",
  "summary": "In my repo I've got this `using MusicLab.Projects.Models; using System.Collections.Generic; using System.Linq; namespace MusicLab.Projects.Data { public class InstrumentRepository : IInstrumentRepository { private readonly MusicDbContext _context; public InstrumentRepository(MusicDbContext context) { _context = context; } public List<Instrument> GetInstruments() { return…",
  "key_points": [
    "The article explains SOLID principles in C# programming",
    "Code demonstrates Single Responsibility, Interface Segregation, Dependency Inversion",
    "Interfaces and dependency injection promote modularity and testability"
  ],
  "editors_take": "This implementation of SOLID principles in a C# application promotes modular, maintainable, and testable code by using interfaces, dependency injection, and adherence to individual principles.",
  "illustration": null,
  "coverage": {
    "outlets": 1,
    "also_reported_by": []
  },
  "ai_generated": true,
  "disclaimer": "Summaries, key points and the editor’s take are written by software from other outlets’ reporting and may contain errors — always check the linked original."
}