.NET

SOLID Design Principles Tutorial

SOLID principles explained with C# examples—how to refactor legacy code and pass architecture interviews.

8 lessons 9 views All Levels Free
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SOLID Design Principles Tutorial tutorial

Course contents

SOLID Principles

1 Introduction to SOLID 5 min 2 Single Responsibility Principle (SRP) 5 min 3 Open/Closed Principle (OCP) 5 min 4 Liskov Substitution Principle (LSP) 5 min 5 Interface Segregation Principle (ISP) 5 min 6 Dependency Inversion Principle (DIP) 5 min 7 SOLID in Real Projects 5 min 8 SOLID Interview Questions 5 min

How this course is organized

  • Each lesson includes overview, steps, code, and interview tips
  • Use the sidebar on lesson pages to navigate
  • Content is original to Toolliyo—not copied from other sites
Begin first lesson Interview Q&A

Course quizzes

SOLID Design Principles — Practice Quiz SignalR Real-Time — Practice Quiz Microservices with .NET — Practice Quiz

Test your knowledge

Quizzes linked to this course—pass to earn certificates.

SOLID Design Principles — Practice Quiz
Test your understanding of SOLID Design Principles Tutorial. Single responsibility, open/c…
Intermediate 15 min Course quiz
SignalR Real-Time — Practice Quiz
Test your understanding of SignalR Real-Time Tutorial. WebSockets, hubs, and live updates …
Intermediate 15 min
Microservices with .NET — Practice Quiz
Test your understanding of Microservices with .NET. Distributed systems, APIs, messaging, …
Intermediate 15 min
LINQ — Practice Quiz
Test your understanding of LINQ Tutorial. Query in-memory and database data with fluent LI…
Intermediate 15 min
Entity Framework Core — Practice Quiz
Test your understanding of Entity Framework Core Tutorial. Modern ORM: Code First, migrati…
Intermediate 15 min
Design Patterns in C# — Practice Quiz
Test your understanding of Design Patterns in C#. Creational, structural, and behavioral p…
Intermediate 15 min
Browse all quizzes