- C# 7 and .NET Core: Modern Cross-Platform Development - Second Edition
- C# 7 and .NET Core: Modern Cross-Platform Development - Second Edition
- Credits
- About the Author
- About the Reviewer
- www.PacktPub.com
- Customer Feedback
- Preface
- 1. Hello, C#! Welcome, .NET Core!
- Choosing your development environment
- Installing Microsoft Visual Studio 2017 for Windows
- Installing Microsoft Visual Studio Code for Windows, macOS, or Linux
- Understanding .NET
- Writing and compiling code using the .NET Core CLI tool
- Writing and compiling code using Microsoft Visual Studio 2017
- Writing and compiling code using Microsoft Visual Studio Code
- Managing source code with GitHub
- Practicing and exploring
- Summary
- 2. Speaking C#
- Understanding C# basics
- Declaring variables
- Building console applications
- Operating on variables
- Practicing and exploring
- Summary
- 3. Controlling the Flow, Converting Types, and Handling Exceptions
- 4. Using .NET Standard Types
- Using assemblies and namespaces
- Storing and manipulating text
- Storing data with collections
- Internationalizing an application
- Practicing and exploring
- Summary
- 5. Debugging, Monitoring, and Testing
- 6. Building Your Own Types with Object-Oriented Programming
- Talking about OOP
- Building class libraries
- Storing data with fields
- Writing and calling methods
- Controlling how parameters are passed
- Splitting classes using partial
- Controlling access with properties and indexers
- Practicing and exploring
- Summary
- 7. Implementing Interfaces and Inheriting Classes
- Setting up a class library and console application
- Simplifying methods with operators
- Defining local functions
- Raising and handling events
- Implementing interfaces
- Managing memory with reference and value types
- Inheriting from classes
- Casting within inheritance hierarchies
- Inheriting and extending .NET types
- Practice and explore
- Summary
- 8. Working with Databases Using the Entity Framework Core
- 9. Querying and Manipulating Data with LINQ
- 10. Working with Files, Streams, and Serialization
- 11. Protecting Your Data
- 12. Improving Performance and Scalability with Multitasking
- 13. Building Universal Windows Platform Apps Using XAML
- 14. Building Web Applications Using ASP.NET Core MVC
- Understanding ASP.NET Core
- Exploring an ASP.NET Core MVC web application
- ASP.NET Core MVC controllers
- ASP.NET Core MVC models
- ASP.NET Core MVC views
- Taking ASP.NET Core MVC further
- Practicing and exploring
- Summary
- 15. Building Mobile Apps Using Xamarin.Forms and ASP.NET Core Web API
- Understanding Xamarin.Forms
- Building services using ASP.NET Core Web API and Visual Studio Code
- Building mobile apps using Xamarin.Forms and Visual Studio for Mac
- Creating a Xamarin.Forms project
- Creating a model
- Creating an interface for dialing phone numbers and implement for iOS and Android
- Creating views for the customers list and customer details
- Test the mobile app with iOS
- Adding NuGet packages for calling a REST service
- Getting customers from the service
- Practicing and exploring
- Summary
- 16. Packaging and Deploying Your Code Cross-Platform
- A. Answers to the Test Your Knowledge Questions
- Chapter 1 - Hello, C#! Welcome, .NET Core!
- Chapter 2 - Speaking C#
- Chapter 3 - Controlling the Flow, Converting Types, and Handling Exceptions
- Chapter 4 - Using .NET Standard Types
- Chapter 5 - Debugging, Monitoring, and Testing
- Chapter 6 - Building Your Own Types with Object-Oriented Programming
- Chapter 7 - Implementing Interfaces and Inheriting Classes
- Chapter 8 - Working with Databases Using Entity Framework Core
- Chapter 9 - Querying and Manipulating Data with LINQ
- Chapter 10 - Working with Files, Streams, and Serialization
- Chapter 11 - Protecting Your Data
- Chapter 12 - Improving Performance and Scalability with Multitasking
- Chapter 13 - Building Universal Windows Platform Apps Using XAML
- Chapter 14 - Building Web Applications Using ASP.NET Core MVC
- Chapter 15 - Building Mobile Apps Using Xamarin.Forms and ASP.NET Core Web API
- Chapter 16 - Packaging and Deploying Your Code Cross-Platform
This chapter is about making your own types using object-oriented programming (OOP). You will learn about all the different categories of members that a type can have, including fields to store data and methods to perform actions. You will use OOP concepts such as aggregation and encapsulation. You will also learn about C# 7 language features, such as tuple syntax support and out variables.
This chapter will cover the following topics:
- Talking about OOP
- Building class libraries
- Storing data with fields
- Writing and calling methods
- Controlling how parameters are passed
- Splitting classes using partial
- Controlling access with properties and indexers
An object in the real world is a thing, such as a car or a person. An object in programming often represents something in the real world, such as a product or bank account, but can also be something more abstract.
In C#, we use class (usually) or struct (rarely) to define each type of object. You can think of a type as being a blueprint or template for an object.
- Encapsulation is the combination of the data and actions that are related to an object. For example, a
BankAccounttype might have data, such asBalanceandAccountName, as well as actions, such asDepositandWithdraw. When encapsulating, you often want to control what can access those actions and the data. - Composition is about what an object is made of. For example, a car is composed of different parts, such as four wheels, several seats, an engine, and so on.
- Aggregation is about what is related to an object. For example, a person could sit in the driver's seat and then becomes the car's driver.
- Inheritance is about reusing code by having a subclass derive from a base or super class. All functionality in the base class becomes available in the derived class.
- Abstraction is about capturing the core idea of an object and ignoring the details or specifics. Abstraction is a tricky balance. If you make a class more abstract, more classes would be able to inherit from it, but there will be less functionality to share.
- Polymorphism is about allowing a derived class to override an inherited action to provide custom behavior.
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