Book Image

C# 7 and .NET Core Cookbook - Second Edition

Book Image

C# 7 and .NET Core Cookbook - Second Edition

Overview of this book

C# has recently been open-sourced and C# 7 comes with a host of new features for building powerful, cross-platform applications. This book will be your solution to some common programming problems that you come across with C# and will also help you get started with .NET Core 1.1. Through a recipe-based approach, this book will help you overcome common programming challenges and get your applications ready to face the modern world. We start by running you through new features in C# 7, such as tuples, pattern matching, and so on, giving you hands-on experience with them. Moving forward, you will work with generics and the OOP features in C#. You will then move on to more advanced topics, such as reactive extensions, Regex, code analyzers, and asynchronous programming. This book will also cover new, cross-platform .NET Core 1.1 features and teach you how to utilize .NET Core on macOS. Then, we will explore microservices as well as serverless computing and how these benefit modern developers. Finally, you will learn what you can do with Visual Studio 2017 to put mobile application development across multiple platforms within the reach of any developer.

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Table of Contents (17 chapters)
Preface
Preface
What this book covers
What you need for this book
Who this book is for
Sections
Conventions
Reader feedback
Customer support
Free Chapter
1
New Features in C# 7.0
New Features in C# 7.0
Introduction
Working with Tuples - getting started
Working with Tuples - going deeper
Pattern matching
Out variables
Deconstruction
Local functions
Improvements to literals
Ref returns and locals
Generalized async return types
Expression bodies for accessors, constructors, and finalizers
throw expressions
2
Classes and Generics
Classes and Generics
Introduction
Creating and implementing an abstract class
Creating and implementing an interface
Creating and using a generic class or method
Creating and using a generic interface
3
Object-Oriented Programming in C#
Object-Oriented Programming in C#
Introduction
Using inheritance in C#
Using abstraction
Leveraging encapsulation
Implementing polymorphism
Single responsibility principle
Open/closed principle
Exception handling
4
Code Analyzers in Visual Studio
Code Analyzers in Visual Studio
Introduction
Finding and installing analyzers
Creating a code analyzer
Creating a custom code analyzer
Deploying your code analyzer within your organization only
5
Regular Expressions
Regular Expressions
Introduction
Getting started with regex - Matching a valid date
Sanitizing input
Dynamic regex matching
6
Working with Files, Streams, and Serialization
Working with Files, Streams, and Serialization
Introduction
Creating and extracting ZIP archives
In-memory stream compression and decompression
Async and await file processing
How to make a custom type serializable?
Using ISerializable for custom serialization to a FileStream
Using XmlSerializer
JSON serializers
7
Making Apps Responsive with Asynchronous Programming
Making Apps Responsive with Asynchronous Programming
Introduction
Return types of asynchronous functions
Handling tasks in asynchronous programming
Exception handling in asynchronous programming
8
High Performance Programming Using Parallel and Multithreading in C#
High Performance Programming Using Parallel and Multithreading in C#
Introduction
Creating and aborting a low-priority background thread
Increasing the maximum thread pool size
Creating multiple threads
Locking one thread until the contended resources are available
Invoking parallel calls to methods using Parallel.Invoke
Using a parallel foreach loop
Cancelling a parallel foreach loop
Catching errors in parallel foreach loops
Debugging multiple threads
9
Composing Event-Based Programs Using Reactive Extensions
Composing Event-Based Programs Using Reactive Extensions
Introduction
Installing Rx
Events versus observables
Using LINQ to perform queries
Using schedulers in Rx
Debugging lambda expressions
10
Exploring .NET Core 1.1
Exploring .NET Core 1.1
Introduction
Creating a simple .NET Core application and running it on a Mac
Creating your first ASP.NET Core application
Publishing your ASP.NET Core application
11
ASP.NET Core on the MVC Framework
ASP.NET Core on the MVC Framework
Introduction
Including middleware and why it is useful
Creating Controllers and using routing
Rendering Views
12
Choosing and Using a Source Control Strategy
Choosing and Using a Source Control Strategy
Introduction
Setting up Visual Studio account management and determining which source control solution is best for you
Setting up Visual Studio GitHub integration, checking in code for the first time, and checking in changes
Working as a team using GitHub, handling and resolving conflicts in code
13
Creating a Mobile Application in Visual Studio
Creating a Mobile Application in Visual Studio
Introduction
Installing Xamarin and other required components on your Windows PC and Mac
Creating a mobile application using Apache Cordova
Creating an iOS application using Xamarin.Forms and Visual Studio for Mac
14
Writing Secure Code and Debugging in Visual Studio
Writing Secure Code and Debugging in Visual Studio
Introduction
Encrypting and storing passwords correctly
Using SecureString in code
Securing sensitive parts of the App.config/web.config
Preventing SQL injection attacks
Using IntelliTrace, diagnostic tools, and historical debugging
Setting conditional breakpoints
Using PerfTips to identify bottlenecks in code
15
Creating Microservices on Azure Service Fabric
Creating Microservices on Azure Service Fabric
Introduction
Downloading and installing Service Fabric
Creating a Service Fabric application with a stateless actor service
Using Service Fabric Explorer
16
Azure and Serverless Computing
Azure and Serverless Computing
Introduction
Creating an Azure function
Providing print functionality with DocRaptor
Using AWS and S3
Creating C# Lambda functions with AWS

Introduction

Traditionally, developers wrote applications in a monolithic manner. This means one single executable that is broken up into components via classes and so on. Monolithic applications require a great deal of testing, and deployment is tedious due to the bulkiness of the monolithic application. Even though you might have multiple developer teams, they all need to have a solid understanding of the application as a whole.

Microservices is a technology that aims to address the issues surrounding monolithic applications and the traditional way of developing applications. With microservices, you can break the application into smaller bits (services) that can function on their own without being dependent on any of the other services. These smaller services can be stateless or stateful and are also smaller in scale of functionality, making them easier to develop, test, and deploy. You can also version each microservice...

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