Web Development with Blazor: A practical guide to building interactive UIs with C# 14 and .NET 10 4th Edition

Master Blazor’s evolving render modes, hosting models, and observability features with practical projects and real-world architecture. Build confidently for production with .NET 10 and C# 14

Key Features

• Dedicated, side-by-side coverage of Blazor render modes without forcing them into a single project
• Updated for .NET 10 LTS with first-class coverage of .NET Aspire and modern observability
• Project structures and examples designed around real production constraints, not demos

Book Description

Blazor has grown, and with that growth comes a simple question: How should we build Blazor apps today?

This book answers that question by building a real application step by step. We start with what Blazor is, why it is not just WebAssembly, and how the different hosting models fit together. From there, we create components, manage state, build forms with validation, add APIs, secure the app with authentication and authorization, use JavaScript when it makes sense, and test our components with bUnit.

We also look at the key aspects of modern Blazor development, including render modes, server-side rendering, WebAssembly, Aspire, OpenTelemetry, debugging, deployment, and how to work with existing sites when starting from scratch is not an option.

The goal is not only to copy code but also to understand why we choose one approach over another. Should this be SSR, Server, WebAssembly, or Auto? Where should interactivity live? What changes when the code runs in the browser? We answer those questions without making things more complicated than they need to be.

Whether you’re new to Blazor or upgrading from an earlier edition, the fourth edition brings the book up to date with .NET 10, Aspire, tracing, metrics, testing, and modern Blazor app development.

Own a raccoon cover already? The collection must continue. The raccoons insist.

What you will learn

• Understand how Blazor works and when to use each render mode
• Build simple and advanced Blazor components with confidence
• Structure applications to separate concerns and support multiple hosting models
• Implement authentication and authorization using modern .NET patterns
• Improve performance with caching and rendering optimizations
• Use OpenTelemetry to gain insights into application behavior and performance
• Build, run, and manage applications using Aspire

Who this book is for

This book is for .NET web developers and software developers who want to use their existing C# skills to build interactive web applications running in the browser with Blazor WebAssembly, on the server with Blazor Server, or using a combination of both.

You’ll need a basic understanding of C# and some prior exposure to .NET web development. The book will guide you through the rest.

Table of Contents

1. Hello Blazor
2. Creating Your First Blazor App
3. Exploring Render Modes
4. Uncovering Aspire
5. Managing State – Part 1
6. Understanding Basic Blazor Components
7. Creating Advanced Blazor Components
8. Building Forms with Validation
9. Creating an API
10. Adding Authentication and Authorization
11. Sharing Code and Resources
12. JavaScript Interop
13. Managing State – Part 2
14. Debugging the Code
15. Exploring Tracing and Metrics
16. Testing
17. Deploy to Production
18. Moving From, or Combining, an Existing Site
19. Going Deeper into WebAssembly
20. Examining Source Generators
21. Visiting .NET MAUI
22. Where to Go from Here