Course

C# OOP - October 2025

The C# OOP course will teach students the principles of object-oriented programming (OOP), work with classes and objects, use object-oriented modeling and build class hierarchies. The basic principles of OOP such as abstraction (interfaces and abstract classes), encapsulation, inheritance and polymorphism will be studied. We will delve into the most commonly used design patterns (creational, structural and behavioral design patterns). Participants will get acquainted with the SOLID principles for object-oriented software design. Different debugging techniques will be considered. Students will learn how to create and use decorators. Attention will be paid to component testing (writing unit tests) and the concept of Test Driven Development (TDD).

Skills which you will acquire

Understanding the object-oriented programming paradigm
Apply the principles of object-oriented programming
Creating a hierarchy of classes and inheritance
Using the Reflection API
Data Encapsulation
Unit Testing

Topics

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Inheritance
Inheritance

• Inheritance
• Class Hierarchies
• Accessing Base Class Members
• Reusing Classes
• Type of Class Reuse.

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Exercise: Inheritance
Exercise: Inheritance

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Encapsulation
Encapsulation

• What is Encapsulation?
• Keyword this
• Access Modifiers
• Mutable and Immutable Objects.

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Exercise: Encapsulation
Exercise: Encapsulation

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Interfaces and Abstraction
Interfaces and Abstraction

• Abstraction
• Interfaces
• Abstract Classes
• Interfaces vs Abstract Classes.

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Exercise: Interfaces and Abstraction
Exercise: Interfaces and Abstraction

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Polymorphism
Polymorphism

• Polymorphism
• Override Methods
• Overload Methods.

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Exercise: Polymorphism
Exercise: Polymorphism

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Exception Handling
Exception Handling

• What are Exceptions?
• Handling Exceptions
• Raising (Throwing) Exceptions
• Best Practices
• Creating Custom Exceptions.

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Debugging Techniques
Debugging Techniques

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SOLID
SOLID

• Single Responsibility
• Open/Closed
• Liskov Substitution
• Interface Segregation
• Dependency Inversion.

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Exercise: SOLID
Exercise: SOLID

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Reflection and Attributes
Reflection and Attributes

• Reflection API
• Attributes.

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Exercise: Reflection and Attributes
Exercise: Reflection and Attributes

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Unit Testing
Unit Testing

• What is Unit Testing?
• Unit Testing Basics
• Unit Testing Framework - NUnit
• Mocking and Mock Objects.

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Exercise: Unit Testing
Exercise: Unit Testing

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Mocking and Test Driven Development
Mocking and Test Driven Development

• Mocking
• Code and Test
• Test-Driven Development
• Reasons to use TDD
• Myths and Misconceptions about TDD.

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Exercise: Mocking and Test Driven Development
Exercise: Mocking and Test Driven Development

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Design Patterns
Design Patterns

• Definition of Design Patterns
• Benefits and Drawbacks
• Types of Design Patterns.

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Exercise: Design Patterns
Exercise: Design Patterns

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Exam Preparation
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Exam Preparation
Exam Preparation

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Workshop
Workshop

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Workshop
Workshop

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Regular Exam
Regular Exam

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Retake Exam
Retake Exam

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Who is the target audience for the course?

The course is suitable for students who have mastered the syntax of the language and working with the standard library, who want to master the principles and best practices of object-oriented programming. The required level of English required for the course must meet B2.

How to enroll in the course?

To sign up for the course, click HERE or the ENROLL button. After a successful payment, you will be enrolled in the training.

What is the deadline for enrolling in the course and when does it start?

Enrollment in the course is open until 1 September 2025. The training starts on 2 September 2025. You can find a detailed schedule of classes in the Topics section.

How and where are the classes be held?

You can study online in real time. Immediately after each lesson, you also get access to the lesson recording and learning resources.

What is the date of the exam and what does it include?

The exam will be held online and includes practical exercises. The dates of the exam are 22nd Dec 2025 for the main exam and 30th of Dec 2025 for the retake exams.

Do I get a certificate after the exam?

After passing the exam, you acquire a certificate issued by SoftUni if your score is above 70%.