C# Design Patterns

Build better code by leveraging design patterns in C#. Learn about the purpose and effective use of design patterns, and discover how to apply Gang of Four patterns in your code.

Introduction

• Object-oriented design patterns in C#
• What you should know
• Review of terms
• Using the exercise files and installing .NET SDK

1. Defining Software Design Patterns

• Object-oriented programming
• What isn't OOP for design patterns
• C#, OOP, and design patterns
• What are design patterns?
• Why do you need design patterns?
• A short history of design patterns
• Categories of design patterns
• Challenge: Design patterns outside of software
• Solution: Design patterns outside of software

2. Get Started with Design Patterns

• Using software design patterns
• Software design pattern drawbacks
• Overview of the creational patterns for C#
• Overview of the structural patterns for C#
• Overview of the behavioral patterns for C#

3. The Iterator Pattern

• Iterator pattern definition
• Explicit iterator implementation in C# for generated data
• Combining iterators in C# with LINQ
• Challenge: Simultaneous iterators
• Solution: Simultaneous iterators

4. The Factory Method Pattern

• Factory Method pattern definition
• Factory Method pattern to choose the implementation of an action dynamically
• Factory Method design pattern for unit testing
• Challenge: Factory Method with dependency injection
• Solution: Factory Method with dependency injection

5. The Adapter Pattern

• Adapter pattern definition
• Adapter in C#: Adapt FileStream to ILogger
• Adapter pattern for ViewModel mapping
• Challenge: Class adapter vs. object adapter
• Solution: Class adapter vs. object adapter

Conclusion

• Next steps