C# 12 for Cloud, Web, and Desktop Applications: Modern concepts and techniques for software development with C# 12

Cover....2

Title Page....3

Copyright Page....5

Dedication Page....6

About the Author....7

About the Reviewers....8

Acknowledgement....10

Preface....11

Table of Contents....18

1. Introduction to Visual Studio 2022....29

Introduction....29

Structure....29

Objectives....30

Significant changes from Visual Studio 2019....30

Performance improvements....31

64 -bit support....33

Smarter IntelliCode....34

Razor editor improvements....34

Hot reload with new capabilities....35

Multi-repository support....36

Interactive staging support....36

Interface improvements and customization....37

Live unit testing....39

Using the live unit testing....39

Supported testing frameworks....41

Exclude and include test projects and test methods....42

Configuring according to your needs....43

Snapshot debugging....44

Using snapshot debugging....45

Supported frameworks and environments....49

Required permissions and limitations....50

Time Travelling Debugging....51

Using time travelling debug....51

Recording a snapshot....51

Viewing the snapshots....53

Time travelling debug limitation....53

Conclusion....54

2. What is New in C# 12....55

Introduction....55

Structure....56

Objectives....57

C# 11 updates....57

Raw string literals....57

Generic math support....59

Generic attributes....61

Unicode Transformation Format-8 string literals....63

Newlines in string interpolation expressions....64

List patterns....66

File-local types....72

Required members....74

Auto-default structs....77

Pattern match Span on a constant string....79

Extended nameof scope....80

Numeric IntPtr and UIntPtr....82

ref fields and scoped ref....83

Improved method group conversion to delegate....85

Warning wave 7....88

C# 12 updates....89

Primary constructors....90

Collection expressions....91

Inline arrays....92

Default lambda parameters....93

ref readonly parameters....94

Alias any type....97

Conclusion....97

3. Mastering Entity Framework Core....99

Introduction....99

Structure....100

Objectives....100

Mastering Entity Framework Core....101

Database First....101

Benefits of using Database First....102

Implementation step-by-step....102

Code First....104

Benefits of using Code First....105

Implementation step-by-step....105

LINQ to Entities....109

Data Annotations....111

Most common Data Annotations....111

Applying Data Annotations....112

Data Modeling....115

One-to-one relationship....116

Required one-to-one....116

Optional one-to-one....118

One-to-many relationship....120

Required one-to-many....120

Optional one-to-many....123

Many-to-many relationship....124

Data Management....127

Normal usage....128

Unit of work....131

Repository pattern....133

Conclusion....138

4. Getting Started with Azure Functions....141

Introduction....141

Structure....142

Objectives....142

Getting started with Azure Functions....143

Azure Function triggers....145

Azure Function bindings....147

Practical case-study....149

Creating the Azure Function....149

Selecting the trigger....152

Pickinging an appropriate binding....154

Testing the output....162

Conclusion....165

Points to remember....166

Exercises....168

5. Azure SQL, Cosmos DB and Blob Storage....169

Introduction....169

Structure....170

Objectives....171

Azure SQL, Cosmos DB and Blob Storage....171

Azure SQL....171

Scaling Azure SQL Server....173

Usage example....175

Creating the Azure resource....175

Connecting to the database....178

Cosmos DB....184

Cosmos DB Containers....186

Scaling Cosmos DB....186

Triggers, stored procedures, and UDFs....187

Change feed notifications with Cosmos DB....189

Usage examples of Cosmos DB for NoSQL....190

Creating the Azure Resource....190

Connecting to the Database....192

Blob Storage....200

Scaling Blob Storage....202

Usage example....204

Creating the Azure Resource....204

Connecting to the Database....207

Conclusion....210

6. Unleashing the Power of Async Operations with Azure Service Bus....213

Introduction....213

Structure....214

Objectives....214

Async operations with Service Bus....215

Azure Service Bus Queues....217

Session Queues....220

Azure Service Bus Topics....220

Azure Service Bus Subscriptions....222

Azure Service Bus vs Azure Queue Storage Queues....224

Case study....226

Creating a new Azure Service Bus....228

Publishing to Azure Service Bus....235

Consuming messages....239

Consuming message batches....242

Message processor....244

Consuming sessions....247

Session processor....249

Consuming Topics and Subscriptions....254

Conclusion....256

7. Securing Your Apps with Azure Key Vault....260

Introduction....260

Structure....261

Objectives....262

Azure Key Vault Overview....262

Azure Key Vault Authentication....264

Azure Key Vault Access policies....266

Case study....268

Creating Azure Key Vault....269

Managing Key Vault Access policies....271

Accessing a key....272

Conclusion....280

8. Building Dynamic Web Apps with Blazor and ASP.NET....283

Introduction....283

Structure....284

Objectives....284

Web Apps with Blazor and.NET....284

Hot reload....285

Supported frameworks and application types....286

Unsupported Scenarios....288

Configuring Hot Reload....289

Security....291

Blazor server authentication....292

Blazor WebAssembly authentication....292

Authorization....293

AuthorizeView component....294

Authorize attribute....294

Data binding....295

Two-way data binding....296

Chained data binding....296

Blazor vs Razor....297

Best practices....298

Practical case study....300

Creating a Blazor Server App project....300

Working of hot reload....306

Authorization and authentication....309

Data binding....321

Conclusion....325

9. Real-time Communication with SignalR and ASP.NET....328

Introduction....328

Structure....329

Objectives....329

Real-time communication with SignalR and ASP.NET....330

Where to use SignalR....330

Message transports....331

Hubs....332

SignalR methods....332

Configuration....333

JSON encoding....334

MessagePack encoding....334

Server configuration options....335

Advanced HTTP configuration....337

Client configuration options....340

Configure logging....340

Configure allowed transports....341

Configure Bearer authentication....342

Additional options....342

Authentication and authorization....346

Cookie authentication....347

Bearer token authentication....347

Identity server JWT authentication....348

Windows authentication....349

Claims....350

Policies for hubs and hubs methods authorization....351

Authorization handlers....352

Streaming hub....352

Server-to-client streaming hub....353

Client-to-server streaming hub....354

Case study....354

Authorization and authentication....367

Custom authorization policy....382

Conclusion....389

10. Implementing MicroServices with Web APIs....392

Introduction....392

Structure....393

Objectives....393

Implementing MicroServices with WebAPIs....394

Asynchronous communication....394

RabbitMQ....396

MicroServices scalability....403

Horizontal scalability....404

Vertical scalability....407

Orchestrators....410

Most used architectural patterns....412

Backend for frontend....412

Command Query Responsibility Segregation....414

Domain Driven Design....417

Case study....419

Conclusion....438

11. CI/CD with Docker and Azure DevOps....441

Introduction....441

Structure....442

Objectives....443

Overview....443

Docker....444

Docker containers....445

Container images....446

Docker images....448

Container images X Docker images....449

Docker advantages for your apps....450

Understanding the Dockerfile....451

Dockerfile for multi-stage builds....453

Docker commands....455

Azure DevOps....456

Continuous integration....458

Benefits of continuous integration....458

Continuous deployment....460

Benefits of continuous deployment....460

Case study....461

Creating the Dockerfile....463

Creating the Docker image....464

Run the image....466

Applying continuous integration....467

Applying continuous deployment....474

Conclusion....476

12. Building Multi-platform Apps with .NET MAUI and Blazor Hybrid....479

Introduction....479

Structure....480

Objectives....481

.NET MAUI overview....481

Differences between Blazor X Blazor Hybrid....483

Case study with step-by-step implementation....484

Creating the .NET MAUI project....484

Using Blazor Hybrid UI from Desktop client....485

Using Blazor Hybrid UI from mobile client....488

Conclusion....491

13. Windows UI Library: Crafting Native Windows Experience....493

Introduction....493

Structure....494

Objectives....494

Windows UI Library Introduction....495

Fluent Design System....497

Key principles of Fluent Design System....497

Applications of the Fluent Design System....498

Case study with step-by-step implementation....499

Creating the project....499

Designing the user interface....500

Implementing the cache....503

Data transfer between pages....504

Conclusion....518

14. Unit Testing and Debugging....520

Introduction....520

Structure....521

Objectives....521

Unit testing with xUnit....521

Making usage of mocks....523

Mastering debugging....526

Applying xUnit and mocks....528

Conclusion....532

Index....534

Description

The world of application development is constantly changing with the rise of open-source languages and technologies. Since Microsoft made the .NET platform and C# open-source in 2014, a vibrant community of developers has contributed to the language's evolution on GitHub. Microsoft releases a new version of .NET every year, leading to newer patterns, frameworks, and design approaches in active application development.

Learn C# 11 & 12 and use Entity Framework Core for data management. Explore cloud development with Azure Functions, Azure SQL Database, Cosmos DB, and Blob Storage. Implement async communication with Azure Service Bus and secure apps with Azure Key Vault. Build web apps with Blazor and ASP.NET, and add real-time features with SignalR. Discover microservices with Web APIs, and streamline your workflow using Azure DevOps and Docker. Develop applications for mobile, desktop, and Windows with .NET MAUI, Blazor Hybrid, and WinUI.

Upon completion, readers will have a solid understanding of the latest C# features and how they fit into current design approaches. The book is not intended to be an exhaustive reference on the subject, but rather a jumping-off point for developers with some experience to begin working with the newest concepts.

Key Features

• Learn the new features of C# 12 and how to apply them in programming.
• Understand how to develop cloud-based applications using Azure.
• Discover how to build applications for desktop using .NET MAUI.

What you will learn

• Learning the fundamentals of C# 12 programming language.
• Understanding advanced concepts like LINQ and asynchronous programming.
• Building web applications using ASP.NET Core, MVC and Blazor.
• Crafting cross-platform desktop applications using .NET MAUI.
• Unit testing using NUnit for robust code validation.

Who this book is for

 This book is geared towards intermediate to advanced .NET developers and software engineers seeking to expand their skill set in building modern cloud-based applications, web apps, and mobile experiences.