Blazor for .NET Developers: A Gentle Introduction to Modern Web UI with C#

Prakash Utadiya — Mon, 30 Jun 2025 08:52:38 +0000

When you hear the word “Blazor”, what’s the first thing that pops into your mind?

A sharp, stylish wedding blazer?
You’re not alone — I thought the same! 😄

But here’s the twist: Blazor isn’t something you wear — it is something you build with.

And not just anything — it is a powerful, open-source web framework from Microsoft that lets you create modern, dynamic web UIs using C# and .NET — with zero JavaScript required.

In this post, I’m going to walk you through some of the most wonderful and useful things about Blazor — a framework that's changing how we build web apps with .NET.

So, let’s begin our journey into the world of Blazor.

What is Blazor ?

The name “Blazor” is a combination of:

Browser – where the app runs, and
Razor – the syntax used in the .razor files to blend HTML and C# code.

So in short, Blazor = Razor in the Browser — with C#, not JavaScript.

Blazor is an open-source web UI framework developed by Microsoft that allows you to build interactive, client-side web applications using C# and .NET, instead of JavaScript.

At a time when most modern front-end development revolves around JavaScript-based frameworks like React, Angular, and Vue, Blazor steps in as a revolutionary alternative — especially for .NET developers who love the power of C# and want to use it across the entire stack.

How Blazor Work?

Blazor introduces a new way of building websites by allowing you to create modern, interactive web user interfaces using just C# and Razor.

Instead of using JavaScript to handle things like button clicks, form submissions, or showing/hiding elements — Blazor lets you do all of that using C# code.

You write your logic in C#, and Blazor handles how it interacts with the browser behind the scenes.

Blazor Hosting Model:

1. Blazor WebAssembly (WASM) :

Your entire app — including C# code and the .NET runtime — is downloaded into the browser.
The app runs completely on the client side, using WebAssembly, a fast binary format supported by all modern browsers.
No need for a constant server connection — the app can even work offline.
Ideal for Single Page Applications (SPAs) and static deployments (e.g., GitHub Pages, Azure Static Web Apps).

2. Blazor Server :

The app runs entirely on the server.
A persistent connection to the browser is maintained via SignalR (real-time messaging like WhatsApp).
Only the UI changes (diffs) and user events are sent between client and server — keeping it lightweight on the browser. The browser acts more like a remote UI viewer.

Features of Blazor :

Component-Based Architecture
Full-Stack C# Development (No JS needed)
Built-in Dependency Injection
JavaScript Interoperability (JS Interop)
Support for Real-Time Apps via SignalR
Large Set of NuGet Packages
Reusable components and wonderful code structure
Dynamic Form Generation and rich Data Validation
Rich Ecosystem of UI Libraries (Radzen, MudBlazor, syncfusion etc.)
Powerful Data Binding and effective Routing using Directives
Pre-rendering for Better Performance
Authentication & Authorization Support & many more...

Blazor is not just a framework — it's a complete shift in how we approach web development in the .NET world.

There are many more powerful features and real-world techniques waiting to be explored.

In the upcoming blogs, we’ll dive deeper into the sea of Blazor, uncovering advanced patterns, practical use cases, and hands-on coding examples.

So stay tuned, and stay connected with me as we continue this exciting journey together!

DEV Community: Prakash Utadiya

Blazor for .NET Developers: A Gentle Introduction to Modern Web UI with C#

What is Blazor ?

How Blazor Work?

Features of Blazor :