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Everything You Need To Know About .NET Core Blazor

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Discover the world of .NET Core Blazor—a revolutionary solution that makes web app development for whole-stack programmers. Say goodbye to the complexity of juggling multiple technologies for front-end and back-end. 

With Blazor, you can seamlessly integrate both aspects using just one language: C#. Join us as we explore the unique qualities, benefits, and future of ASP .NET Core Blazor.

We’ll provide a practical example and discuss browser compatibility, enabling you to leverage the potential of Blazor effortlessly.

So, let’s dive in and uncover the exciting world of ASP .NET Core Blazor!

What is .NET Core Blazor?

.NET Core Blazor is a Microsoft framework for developing interactive client-side web user interfaces (UI) using .NET application development.

It allows developers to create rich and dynamic UIs using C# and share app logic between the client-side & server-side, all within the .NET ecosystem.

Blazor is unique as it enables developers to write interactive web applications using C# and .NET Core instead of relying on JavaScript. That opens up the opportunity for developers with a background in C# to leverage their existing skills to build modern web applications. 

With Blazor, developers can render the user interface as HTML and CSS for browser support, including support for mobile web browsers. Moreover, Blazor makes it easier to create hybrid applications for desktops and smartphones utilizing the.NET framework.

Three distinct hosting options are available for Blazor: Web Assembly, server-side in ASP.NET Core blazor, and native client apps. This flexibility allows developers to choose the hosting model that best suits their project requirements.

5 Unique Characteristics of .NET Core Blazor

The .NET Core Blazor framework has several unique characteristics that set it apart from other frameworks for developing websites:

Coding with C# 

With .NET Core Blazor, developers write their web applications using C# instead of relying solely on JavaScript. It means the developers who know how to work with C# can leverage their existing skills and knowledge, making the learning curve for Blazor development smoother. 

Developers can use C# language features, such as strong typing, object-oriented programming, and the extensive .NET Core ecosystem, to build robust and maintainable web applications, as demonstrated in various web application examples.

Two Serving Approaches

Blazor supports two serving approaches: client-side WebAssembly and server-side.

Client-side WebAssembly

The Blazor application is delivered to the client’s browser using this model as a WebAssembly file. The application runs directly in the browser, providing a rich client-side experience. 

The advantages of this model include faster and more responsive UI rendering, offline capabilities, and the ability to leverage the browser’s optimization capabilities. However, it requires the browser to support WebAssembly.


In the server-side model, the Blazor application operates on the server, and the UI updates are sent to the client using SignalR. It means the variety of the application’s code runs on the server, reducing the overhead on the client’s device. 

The advantages of this model include compatibility with older browsers, improved security by keeping the application code on the server, and the ability to leverage existing server-side infrastructure. The UI developments, however, need to be delivered from the website to the user over a dependable internet connection.

C# Components 

Blazor introduces the concept of components that are reusable building blocks for user interfaces. Components are written in C# and can be combined to create complex UIs. Components provide a declarative syntax using Razor markup syntax, which allows developers to separate the UI and application logic. 

They also support data binding, allowing data to flow bidirectionally between the component and its UI. Developers can use the lifecycle methods provided by many elements to carry out specific tasks during the component’s lifespan, such as initialization, rendering, and disposal.

Blazor as a Part of .NET Core 

Blazor’s integration with the.NET Core ecosystem has many benefits. Developers can leverage the performance, scalability, and cross-platform compatibility of .NET Core when building Blazor applications. 

They have access to the extensive set of libraries and services provided by ASP .NET Core blazor, which helps accelerate development and increase code reusability. Additionally, Blazor can easily integrate with other .NET Core technologies such as Entity Framework Core, dependency injection, and ASP.NET Core.

Building Hybrid Applications 

Blazor promotes the developer’s ability to develop hybrid mobile applications and desktop applications using.NET in addition to web applications.

With the combination of Blazor and technologies like Electron or Xamarin, developers can make native-like applications for different platforms using the same codebase. 

This approach reduces development time and effort, as developers can reuse a significant portion of their code across multiple platforms.

By using Blazor for hybrid application development, developers can take advantage of the productivity and familiarity of C# and the powerful features of the .NET ecosystem for building cross-platform applications.

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Extra Characteristics and Functionalities of .NET Core Blazor

The following extra characteristics and functionalities that .Net Core Blazor provides considerably improve the programming experience:

GraphQL Support: You can efficiently manage data queries and changes with Blazor’s seamless integration of GraphQL thanks to frameworks like GraphQL.NET and Hot Chocolate.

CSS Isolation: Well-known JavaScript libraries like Angular and React, Blazor supports CSS isolation, enabling you to style individual components independently.

gRPC Framework: The gRPC framework is supported by Blazor, allowing seamless remote communication between the client and the server.

Lazy Loading: Blazor incorporates slow downloading for improved app performance. This feature loads components and resources as needed, reducing initial load time.

Native Virtualization: Blazor natively supports virtualization through virtualized components, enabling efficient rendering of large datasets and improving app responsiveness.

Hot Reload: Blazor offers native support for fast reload functionality, allowing you to apply changes on the fly without restarting the application, which can significantly speed up the development process.

Realtime Web Functionality with SignalR: Blazor integrates with SignalR, a freely accessible library, to facilitate immediate web capabilities, such as live updates and instant communication between clients and servers.

Experimental JavaScript Component Generation: Blazor provides practical assistance for creating JavaScript factors automatically, allowing seamless integration with existing JavaScript libraries or frameworks.

JavaScript Interop: You may quickly incorporate JavaScript functionality into your Blazor applications thanks to Blazor’s ability to access Blazor features from JavaScript code.

Will Blazor Stay Relevant in the Coming Years?

Blazor is poised for a bright future in web development and could become the go-to option for creating web applications and hybrid apps in the .NET Core world.

With each new update and advancement in .NET Core compared to the older .NET Framework, Blazor becomes even better and more exciting for .NET developers.

As the distinctions between .NET Core and .NET Framework become clearer, Blazor’s potential within the .NET ecosystem becomes increasingly evident.

It’s also free and open-source, which means it’s likely to stay relevant for a long time. Plus, it has a robust and helpful community, ensuring that Blazor continues to lead the way in modern web development.

Is Blazor in an Experimental Stage?

No, Blazor is not in an experimental phase. It was introduced in 2018 and has evolved into an established, freely available web programming platform within the .NET Core ecosystem.

Many ASP.NET Core and C# developers have embraced blazor to create numerous applications, including WebAssembly apps, native apps, and server-only apps.

Furthermore, a sizable community of Blazor developers and contributors is active on GitHub and contributes to the platform’s development.

The Benefits of Using Blazor for Web Development

Blazor offers several significant advantages as a primary development framework:

Impressive Speed 

One of the quickest web development frameworks on the market is Blazor. Blazor beats JavaScript based on speed and responsiveness by utilizing the .NET implementation on top of the web browser, providing a highly successful user experience.

Familiar Syntax

Blazor is helpful for developers because it keeps the same structure as C#. This familiarity makes it easier for C# programmers to transition into Blazor development seamlessly, reducing the learning curve and increasing productivity.

Cross-platform and Open Source 

As a part of ASP.NET Core, Blazor benefits from its cross-platform compatibility and freely accessible nature. Developers can build applications using Blazor on various platforms, including Windows, Linux, and macOS, and take advantage of the vast community support and continuous improvement through contributions from the open-source community.

Vast Library Support 

Blazor offers access to the extensive .NET Core library, providing developers with a wide range of pre-built functionality and components. Developers may quickly incorporate compatible libraries and needs by integrating them as separate NuGet packages, which allows them to speed up programming and increase code reuse.

Offline App Support

Blazor enables Wasm (WebAssembly) programs to operate in the user’s browser even when they are unavailable, supported by offline applications.

This capability supports users to continue using the app and accessing its functionalities without an internet connection, which showcases the uses of .NET and .NET framework advantages, leading to enhanced user experiences and improved productivity in scenarios where internet connectivity may be intermittent or unreliable.

Reliable Development Environment

A dependable and stable environment for development supports the growth of Blazor. The.NET Core framework and Microsoft’s Visual Studio, which provide many functionality options for effective debugging, testing, and installation, are trusted tools that developers rely on. These tools include IntelliSense, intelligent code completion, and many templates that streamline the development process, making it easier and more productive for developers. 

Disadvantages of Blazor

Dependency on Persistent HTTP Connection 

Blazor Server relies on a continuous and persistent HTTP connection between the client’s browser and the server. If this connection is lost due to internet disruptions or server failure, the Blazor application will cease to work until the connection is re-established. This dependency on persistent connectivity can impact the user experience and application availability.

Requirement of ASP.NET Core Server

To run Blazor Server applications, an ASP.NET Core server is required. That means deploying and managing a server-side infrastructure becomes necessary, adding more complexity to the overall setup. Organizations or developers who prefer a simpler serverless environment may find this requirement challenging or inconvenient.

Network Hops with Every User Interaction 

In Blazor Server, user interactions such as button clicks or form submissions result in a round trip to the server for processing. That means that each user action requires a network hop, which can introduce latency and impact the real-time responsiveness of the application. It also increases the load on the server, especially in scenarios with high user concurrency or when dealing with large data transfers.

.Net Core Blazor Example

To initiate the creation of a basic Blazor WebAssembly “Hello World” application using .NET Core Blazor, you should have Visual Studio and the .NET Core SDK installed, ideally with a minimum version of end to end asp .NET Core 3.1 API and blazor development.

Follow these steps:

Open Visual Studio and develop a new application.

Choose the “Blazor App” model from the categories list in the application creation process.

Complete the required confidential details in the subsequent parts. 

Click the Create button after selecting the ‘Blazor Website Installation App’ template in the following step.

You can now start coding in the newly created component. Here’s a basic example:

@page “/hello”

<h1>Hello, Blazor!</h1>

<p>Welcome to the world of .NET Core Blazor.</p>

Run the application to see your Hello World Blazor WebAssembly app in action.

This example demonstrates the ease of creating a simple Blazor app using .NET Core Blazor, allowing you to harness the power of C# for web development.

Read Also: Real-World Examples of .NET Applications

Browser Compatibility and Blazor: What Browsers Does Blazor Support?

Blazor applications can be compatible with any modern web browser that supports recognized web protocols.

That includes all popular browsers like Edge, Chrome, Firefox, Opera, and Brave, as well as smaller and less common browsers that adhere to these standards.

It’s worth noting that Blazor, being a C# framework, allows web applications in C# and renders the application as HTML and CSS on the client side.

That means regardless of the browser used, Blazor compiles the C# code into client-side compatible HTML and CSS, ensuring that the application can be displayed and interacted with seamlessly in any modern browser that supports these standard web technologies.


In conclusion, .NET Core Blazor is a powerful and versatile web development framework that offers unique characteristics like coding in C#, two hosting models, C# components, and the ability to build hybrid applications.

With its growing community and ongoing development, Blazor is not in an experimental phase but a robust choice for modern web development.

Its advantages make it a compelling option for developers, and its support for a wide range of browsers ensures broader accessibility.

The future of Blazor is promising, making it an exciting technology to watch in the world of web development.


What is the downside to using Blazor?

Blazor requires the client’s browser to run WebAssembly or use the Server-Side Blazor model. In contrast to client-side JavaScript frameworks, this constraint can lead to certain performance limitations and extended initial loading times.

Is Blazor better than Angular?

Both Blazor and Angular have their strengths. Blazor allows you to write the entire application in C#, while Angular offers a more mature ecosystem and a larger community. It ultimately depends on your specific needs and preferences.

Why use Blazor instead of React?

Blazor offers a familiar programming language (C#) for front-end and back-end development, eliminating the need to learn JavaScript. React, on the other hand, has a larger community and many available components.

Does Blazor replace MVC?

Blazor can replace some aspects of MVC, especially for developing interactive UI components. However, it can not be viewed as a direct substitute for the MVC framework, as it focuses on client-side UI development.

Will Blazor replace JavaScript?

Blazor doesn’t aim to replace JavaScript. JavaScript is still necessary for certain browser-specific functionality and interacting with existing JavaScript libraries. Blazor complements JavaScript by allowing developers to write C# code for UI development.

Is Blazor the future of .NET web development?

Blazor has gained popularity and has a promising future in the .NET web development ecosystem. It offers an alternative to traditional JavaScript frameworks and enables developers to leverage the power of C# in the browser.

However, the future of web development is diverse, and different frameworks and technologies will continue to coexist.

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