.NET

Design Patterns in C#

Learn Gang of Four patterns applied in .NET: Singleton, Factory, Repository, Strategy, Observer, and more—with when-to-use guidance.

8 lessons 8 views All Levels Free
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Design Patterns in C# tutorial

Course contents

Creational Patterns

1 Singleton Pattern in C# 5 min 2 Factory Method and Abstract Factory 5 min 3 Builder Pattern for Complex Objects 5 min

Structural & Behavioral

4 Adapter and Facade Patterns 5 min 5 Strategy and Observer Patterns 5 min 6 Repository and Unit of Work 5 min 7 SOLID Principles Overview 5 min 8 Design Patterns Interview Q&A 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
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 Course quiz
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