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  • Book Overview & Buying C# 7 and .NET Core: Modern Cross-Platform Development
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C# 7 and .NET Core: Modern Cross-Platform Development

C# 7 and .NET Core: Modern Cross-Platform Development

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C# 7 and .NET Core: Modern Cross-Platform Development

C# 7 and .NET Core: Modern Cross-Platform Development

4.2 (11)
Buy this Book

Overview of this book

If you want to build powerful cross-platform applications with C# 7 and .NET Core, then this book is for you. First, we’ll run you through the basics of C#, as well as object-oriented programming, before taking a quick tour through the latest features of C# 7 such as tuples, pattern matching, out variables, and so on. After quickly taking you through C# and how .NET works, we’ll dive into the .NET Standard 1.6 class libraries, covering topics such as performance, monitoring, debugging, serialization and encryption. The final section will demonstrate the major types of application that you can build and deploy cross-device and cross-platform. In this section, we’ll cover Universal Windows Platform (UWP) apps, web applications, mobile apps, and web services. Lastly, we’ll look at how you can package and deploy your applications so that they can be hosted on all of today’s most popular platforms, including Linux and Docker. By the end of the book, you’ll be armed with all the knowledge you need to build modern, cross-platform applications using C# and .NET Core.
Table of Contents (18 chapters)
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Preface
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Preface
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What this book covers
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What you need for this book
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Who this book is for
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Conventions
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Reader feedback
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Customer support
Free Chapter
1
1. Hello, C#! Welcome, .NET Core!
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1. Hello, C#! Welcome, .NET Core!
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Choosing your development environment
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Installing Microsoft Visual Studio 2017 for Windows
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Installing Microsoft Visual Studio Code for Windows, macOS, or Linux
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Understanding .NET
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Writing and compiling code using the .NET Core CLI tool
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Writing and compiling code using Microsoft Visual Studio 2017
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Writing and compiling code using Microsoft Visual Studio Code
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Managing source code with GitHub
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Practicing and exploring
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Summary
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2. Speaking C#
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2. Speaking C#
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Understanding C# basics
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Declaring variables
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Building console applications
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Operating on variables
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Practicing and exploring
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Summary
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3. Controlling the Flow, Converting Types, and Handling Exceptions
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3. Controlling the Flow, Converting Types, and Handling Exceptions
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Selection statements
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Iteration statements
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Casting and converting between types
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Handling exceptions
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Checking for overflow
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Looking for help
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Practice and explore
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Summary
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4. Using .NET Standard Types
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4. Using .NET Standard Types
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Using assemblies and namespaces
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Storing and manipulating text
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Storing data with collections
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Internationalizing an application
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Practicing and exploring
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Summary
5
5. Debugging, Monitoring, and Testing
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5. Debugging, Monitoring, and Testing
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Debugging tools
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Monitoring performance and resource usage
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Unit testing an application
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Practicing and exploring
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Summary
6
6. Building Your Own Types with Object-Oriented Programming
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6. Building Your Own Types with Object-Oriented Programming
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Talking about OOP
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Building class libraries
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Storing data with fields
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Writing and calling methods
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Controlling how parameters are passed
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Splitting classes using partial
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Controlling access with properties and indexers
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Practicing and exploring
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Summary
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7. Implementing Interfaces and Inheriting Classes
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7. Implementing Interfaces and Inheriting Classes
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Setting up a class library and console application
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Simplifying methods with operators
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Defining local functions
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Raising and handling events
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Implementing interfaces
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Managing memory with reference and value types
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Inheriting from classes
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Casting within inheritance hierarchies
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Inheriting and extending .NET types
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Practice and explore
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Summary
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8. Working with Databases Using the Entity Framework Core
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8. Working with Databases Using the Entity Framework Core
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Relational Database Management Systems
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Using Microsoft SQL Server on Windows
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Using SQLite on macOS and mobile platforms
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Connecting to the database
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Setting up Entity Framework Core
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Querying an EF Core model
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Manipulating data with EF Core
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Practicing and exploring
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Summary
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9. Querying and Manipulating Data with LINQ
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9. Querying and Manipulating Data with LINQ
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Writing LINQ queries
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Working with sets
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Projecting entities with Select
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Sweetening the syntax with syntactic sugar
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Using multiple threads with parallel LINQ
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Creating your own LINQ extension methods
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Working with LINQ to XML
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Practicing and exploring
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Summary
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10. Working with Files, Streams, and Serialization
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10. Working with Files, Streams, and Serialization
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Managing the filesystem
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Reading and writing with streams
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Encoding text
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Serializing object graphs
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Practice and explore
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Summary
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11. Protecting Your Data
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11. Protecting Your Data
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Understanding the vocabulary of protection
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Encrypting and decrypting data
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Hashing data
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Signing data
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Practicing and exploring
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Summary
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12. Improving Performance and Scalability with Multitasking
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12. Improving Performance and Scalability with Multitasking
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Understanding processes, threads, and tasks
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Running tasks asynchronously
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Synchronizing access to shared resources
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Implementing multitasking for a GUI
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Practicing and exploring
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Summary
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13. Building Universal Windows Platform Apps Using XAML
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13. Building Universal Windows Platform Apps Using XAML
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Understanding Universal Windows Platform
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Understanding XAML
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Creating an app for Universal Windows Platform
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Using resources and templates
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Data binding
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Animating with storyboards
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Testing in emulators
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Practicing and exploring
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Summary
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14. Building Web Applications Using ASP.NET Core MVC
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14. Building Web Applications Using ASP.NET Core MVC
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Understanding ASP.NET Core
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Exploring an ASP.NET Core MVC web application
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ASP.NET Core MVC controllers
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ASP.NET Core MVC models
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ASP.NET Core MVC views
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Taking ASP.NET Core MVC further
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Practicing and exploring
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Summary
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15. Building Mobile Apps Using Xamarin.Forms and ASP.NET Core Web API
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15. Building Mobile Apps Using Xamarin.Forms and ASP.NET Core Web API
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Understanding Xamarin.Forms
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Building services using ASP.NET Core Web API and Visual Studio Code
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Building mobile apps using Xamarin.Forms and Visual Studio for Mac
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Practicing and exploring
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Summary
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16. Packaging and Deploying Your Code Cross-Platform
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16. Packaging and Deploying Your Code Cross-Platform
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Porting to .NET Core
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Sharing code cross-platform with .NET Standard class libraries
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Understanding NuGet packages
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Publishing your applications
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Deploying to the cloud
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Developing on and for Linux
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Practicing and exploring
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Summary
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A. Answers to the Test Your Knowledge Questions
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A. Answers to the Test Your Knowledge Questions
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Chapter 1 - Hello, C#! Welcome, .NET Core!
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Chapter 2 - Speaking C#
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Chapter 3 - Controlling the Flow, Converting Types, and Handling Exceptions
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Chapter 4 - Using .NET Standard Types
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Chapter 5 - Debugging, Monitoring, and Testing
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Chapter 6 - Building Your Own Types with Object-Oriented Programming
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Chapter 7 - Implementing Interfaces and Inheriting Classes
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Chapter 8 - Working with Databases Using Entity Framework Core
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Chapter 9 - Querying and Manipulating Data with LINQ
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Chapter 10 - Working with Files, Streams, and Serialization
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Chapter 11 - Protecting Your Data
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Chapter 12 - Improving Performance and Scalability with Multitasking
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Chapter 13 - Building Universal Windows Platform Apps Using XAML
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Chapter 14 - Building Web Applications Using ASP.NET Core MVC
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Chapter 15 - Building Mobile Apps Using Xamarin.Forms and ASP.NET Core Web API
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Chapter 16 - Packaging and Deploying Your Code Cross-Platform

Handling exceptions

You've seen several scenarios when errors have occurred. C# calls where an exception has been thrown. A good practice is to avoid writing code that will throw an exception whenever possible, but sometimes you can't. In those scenarios, you must catch the exception and handle it.

As you have seen, the default behavior of a console application is to display details about the exception in the output and then stop running the application.

The default behavior of a Windows desktop application is to display details about the exception in a dialog box and allow the user to choose to either continue or stop running the application. You can take control over how to handle exceptions using the try statement.

The try statement

Add a new console application project named Ch03_HandlingExceptions.

When you know that a statement can cause an error, you should wrap that statement in a try block. For example, parsing from a string to a number can cause an error. We do not have to do anything...

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