When one class has another class in it and the dependent class can't exist without the super class, this is a composition relationship. For example, a bank account can't exist without a bank, as shown in the following diagram:
- Title Page
- Copyright and Credits
- About Packt
- Contributors
- Preface
- Overview of C# as a Language
- Evolution of C#
- Architecture of .NET
- Fundamentals and syntax of C# language
- Writing your first C# program in a console application
- Visual Studio as an editor
- Writing your first program in Visual Studio
- Summary
- Hello OOP - Classes and Objects
- Implementation of OOP in C#
- Object Collaboration
- Exception Handling
- Why we need exception handling in programming
- Basics of exception handling
- Try and catch
- What happens if you don't handle exceptions?
- Multiple catch blocks
- Using the throw keyword 
- What does the finally block do?
- Exception class
- User-defined exceptions
- Exception filter
- Exception handling best practices
- Summary
- Events and Delegates
- Generics in C#
- Modeling and Designing Software
- Visual Studio and Associated Tools
- Exploring ADO.NET with Examples
- New Features in C# 8
- Understanding Design Patterns and Principles
- Git - The Version Control System
- Prepare Yourself - Interview and the Future
- Interview questions
- What are the fundamental principles of object-oriented programming?
- What is inheritance?
- What is encapsulation?
- What is abstraction?
- What is polymorphism?
- What is an interface?
- What is an abstract class?
- What is a sealed class?
- What is a partial class?
- What are the differences between interfaces and abstract classes?
- What is the difference between method-overloading and method-overriding?
- What are access modifiers?
- What is boxing and unboxing?
- What are the differences between a struct and a class?
- What is an extension method in C# and how do we use it?
- What is managed and unmanaged code?
- What is a virtual method in C#?
- What do you understand by value types and reference types in C#.NET?
- What are design principles?
- What is the single responsibility principle?
- What is the Open/Closed principle?
- What is the Liskov substitution principle?
- What is the interface segregation principle?
- What is the dependency inversion principle?
- Interview and career tips
- Things to learn next
- Building the habit of reading
- Summary
- Interview questions
- Other Books You May Enjoy
Composition
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