Clean Code with C# 

Course & Training

Learn to write clean, modular and production-ready code in C#.

A two or three day workshop where we explore the principles and practices of Clean Code with C#. We focus on small iterations and short feedback loops to develop efficient and maintainable software. Learn how to react fast and efficiently to changes, build production-ready APIs, and safely refactor legacy code.

In-House Course:

We are happy to conduct tailored courses for your team - on-site, remotely or in our course rooms.

Request In-House Course

   

Content:


Clean Code is a crucial aspect of software development that ensures our code remains understandable, modifiable, and extensible. In this course, we learn the principles of Clean Code and how to apply them in C#. The focus is on practical application, testing, and building production-ready code.

The workshop includes the following topics:

– Introduction to Clean Code
... - Why is Clean Code important?
... - How not to fall into the perfectionism trap
... - Overview and expectations for the workshop

– Effective Naming
... - The art of naming variables, methods, and classes
... - Finding meaningful and precise names

– Clean Code Principles
... - SOLID principles to improve code structure
... - DRY (Don't Repeat Yourself) vs. WET (Write Everything Twice)
... - KISS (Keep It Simple, Stupid) and YAGNI (You Ain't Gonna Need It)
... - Composition over Inheritance
... - Integration Operation Segregation Principle (IOSP)

– Refactoring Techniques
... - Identify and name code anti-patterns ("code smells")
... - How to improve existing code without changing its functionality
... - Using automated refactorings in the IDE
... - Boy Scout Rule and continuous improvement

– Testing & Code Quality
... - Unit testing principles
... - Meaningful tests vs. mere coverage
... - Test Driven Development (TDD) basics
... - Using mocks and fakes effectively

– Design Patterns
... - Key design patterns and when to use them
... - Avoiding over-engineering
... - Practical implementation of selected patterns

– Error Handling and Resilience
... - Exception handling strategies
... - Fail-fast principle
... - Logging strategies

– Modularization in C#
... - Project structure and dependency management
... - Configuring dependency injection containers
... - Separation of Concerns

– Working with Legacy Code
... - Characterization tests for existing code
... - Strangler pattern for gradual migration
... - Safe refactoring techniques

– Production-ready APIs
... - REST APIs with proper validation
... - Error responses and documentation
... - Integration tests with TestContainers

– Production Concerns
... - NuGet package management
... - Static code analysis
... - CI/CD basics and configuration management

You will not only get to know these concepts but also apply them practically.


Disclaimer: The actual course content may vary from the above, depending on the trainer, implementation, duration and constellation of participants.

Whether we call it training, course, workshop or seminar, we want to pick up participants at their point and equip them with the necessary practical knowledge so that they can apply the technology directly after the training and deepen it independently.

Goal:

By the end of this course, learners will gain a comprehensive understanding of how to write clean and maintainable code in C#. They will know how to easily and cost-effectively react to changes in a running software project and safely improve legacy code.


Duration:

 2 Days (Is individually adapted for in-house courses.)


Form:

A proven mix of concepts, workshop simulation, live coding and exercises.


Target Audience:

You are a Software Engineer or Architect interested in becoming more proficient at:
- Applying Clean Code principles in software development
- Improving code quality effectively through refactoring and unit testing
- Gaining a deep understanding of best practices in C# and how to apply them
- Implementing SOLID principles to achieve modular, scalable, and maintainable software systems
- Safe refactoring techniques for legacy code


Requirements:

Basic knowledge in software engineering and C#


Preparation:

Each participant receives a questionnaire and installation instructions after registration. Depending on the course, we provide a suitable laboratory environment.

Request In-House Course:

In-House Kurs Anfragen

Waitinglist for public course:

Sign up for the waiting list for more public course dates. Once we have enough people on the waiting list, we will determine a date that suits everyone as much as possible and schedule a new session. If you want to participate directly with two colleagues, we can even plan a public course specifically for you.

Waiting List Request

(If you already have 3 or more participants, we will discuss your preferred date directly with you and announce the course.)

More about Clean Code with C#



Clean Code in C# goes beyond mere formatting – it encompasses principles, patterns, and practices for maintainable, extensible software. This course teaches SOLID, testing, refactoring, and handling legacy code with a focus on the .NET ecosystem.




History


The term "Clean Code" was popularized by Robert C. Martin (Uncle Bob), who published the book of the same name in 2008. The principles are based on decades of software development and were shaped by pioneers like Kent Beck, Martin Fowler, and others.


For C# and .NET, these principles have been further developed by Microsoft and the community. The C# language provides direct support for Clean Code with modern features like records, pattern matching, and nullable reference types.


Today, Clean Code is a recognized standard in professional software development. Combined with testing, CI/CD, and static analysis, robust, maintainable .NET applications emerge.