Migrating from .NET Web Forms to Blazor: A Step-by-Step Guide - Lesson 1

Migrating from .NET Web Forms to Blazor can be simplified with the right approach. This guide helps you assess, migrate, deploy, and monitor your Blazor application.

Steven Lieberman

12/20/20232 min read

laptop computer on glass-top table
laptop computer on glass-top table

Migrating from .NET Web Forms to Blazor: A Step-by-Step Guide

Before starting the migration process, it's essential to understand why you're migrating from ASP.NET WebForms to Blazor. This could be due to the benefits of modernizing with Blazor, such as improved performance and a more modern development experience.

Step 1: Assess Your Web Forms Application

The first step in migrating from .NET Web Forms to Blazor is to assess your existing Web Forms application. Take the time to understand your application's functionality, architecture, and dependencies. This will help you determine the scope and complexity of the migration process.

Step 2: Familiarize Yourself with Blazor

Next, please familiarize yourself with Blazor and its key concepts. Blazor is a single-page application (SPA) framework that allows you to build interactive web UIs using C# instead of JavaScript. It leverages WebAssembly to run C# code directly in the browser, eliminating the need for server-side rendering.

Step 3: Identify Conversion Strategies

Once you have a good understanding of Blazor, identify the conversion strategies that best suit your application. You can take several approaches, such as rewriting the entire application from scratch or gradually migrating individual pages or components. Choose the method that aligns with your goals and resources.

Step 4: Start Small

When migrating from .NET Web Forms to Blazor, starting small is essential. Begin by migrating simple pages or components to get a feel for the migration process. This will help you identify any challenges or issues early on and allow you to make adjustments as needed.

Step 5: Refactor and Optimize

During the migration process, take the opportunity to refactor and optimize your code. Blazor offers a more modern and modular development experience, so consider redesigning your application to take advantage of its features. This may involve breaking down monolithic code into smaller components or leveraging Blazor's component-based architecture.

Step 6: Test and Iterate

After migrating your application to Blazor, thoroughly test it to ensure everything functions as expected. Blazor provides a robust testing framework that allows you to write unit tests for your components. Use this framework to identify and fix any bugs or issues that may arise during the migration process.

Step 7: Deploy and Monitor

Once you're confident in the migrated application, deploy it to your production environment and monitor its performance. Blazor offers improved performance compared to Web Forms, but monitoring and optimizing your application as needed is still essential. Monitor server-side rendering, network requests, and overall user experience.


Migrating from .NET Web Forms to Blazor may seem daunting, but following these steps can simplify the process and reap the benefits of modernizing your application. Remember to assess your application, familiarize yourself with Blazor, choose the right conversion strategy, start small, refactor and optimize test and iterate, and finally deploy and monitor. With careful planning and execution, you can successfully migrate to Blazor and enjoy a more modern and efficient development experience.