5.00
(5 Ratings)

C#/.NET Design Patterns: The Complete Guide

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About Course

C#/.NET Design Patterns: The Complete Guide

Learn the patterns. Recognize the problems. Build better software.

Course Summary

This course teaches all 23 Gang of Four patterns and five enterprise patterns, each starting from the problem it solves. You see the code that hurts first, then refactor it into the pattern in a runnable .NET project.

Every pattern begins with real pain: a growing if/else chain, a class that does too much, an inheritance tree that keeps multiplying. Then the pattern arrives as the fix.

What Will You Learn?

  • Apply all 23 Gang of Four patterns in C#
  • Use Repository, Unit of Work, Specification, CQRS and Saga in real .NET apps
  • Recognize patterns in code you have never seen
  • Diagnose which pattern a problem calls for
  • Choose between look-alikes, such as Strategy and State
  • Spot pattern misuse, and know when simpler code is better
  • Combine patterns with dependency injection

Course Description

Every lesson pairs UML diagrams with a before-and-after refactoring, real examples from ASP.NET Core and EF Core, trade-offs and interview questions. The second half is practice: recognition, refactoring and comparison exercises with hidden solutions, and case studies of patterns used where they should not be.

It is for C# developers who want cleaner, more maintainable code, and for anyone preparing for a technical interview.

You can find an entire TOC with preview lessons in the Course Content section below.

Course Content

Course Overview
What are the course structure and learning goals. Why design patterns matter in real-world C#/.NET development? How to choose the right pattern in a scenario? How's the course structured and what are your learning goals?

Phase 1 – Foundations of Behavior
These patterns are intuitive, practical, and extremely common in .NET.

Phase 2 – Structural Thinking
Now we think about object relationships and architecture.

Phase 3 – Object Interaction & Responsibility Flow
We increase the abstraction level by introducing interaction between object and the flow of responsibilities.

Phase 4 – Object Creation Mastery
Creation patterns are conceptually harder for beginners because they require understanding dependency inversion.

Phase 5 – Advanced / Specialized Patterns
These require strong abstraction maturity.

Bonus – Other Useful Patterns
These are some of the patterns you may need or encounter occasionally out there in the wild.

Let’s Practice!

Conclusion

Student Ratings & Reviews

5.0
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KO
Kingsley Omon-Edo
2 months ago
The elucidation of design patterns is quite comprehensive.
anvar-g
anvar-g
5 months ago
Very interesting course and presentation