One Codebase, Many Looks: Blazor UI Flexibility for Modern Businesses

Why Blazor?

Choosing Blazor as your web platform means you’re invested in a modern, full-stack .NET solution — where your developers can build interactive, client-rich web applications using C# instead of JavaScript.

But here’s the challenge many businesses face:

"What happens when we want to support different customers, brands, or design systems — but don’t want to rebuild our entire application?"

This is where a modular, configurable Blazor UI strategy becomes a game-changer.

Imagine This Scenario

You're a software provider, consultancy, or platform builder. Over time, you’re asked to:

✅ Support white-labeled interfaces for clients
✅ Provide a lightweight version of your app for low-bandwidth environments
✅ Migrate a legacy Bootstrap UI to a modern material look (e.g., MudBlazor or Telerik)
✅ Trial a new UI library internally without breaking your production system

With a traditional approach, this could mean separate codebases, duplicated logic, and a huge maintenance overhead.

The Solution: UI Abstraction + Runtime Selection

At Assemblysoft, we have been helping a selection of forward-thinking clients to not only structure their Blazor apps to separate business logic from UI components, but to also enable the entire UI Framework to be selected at runtime, depending on the scenario.

Why Multiple UI Targets Are Sometimes Necessary

Why Multiple UIs Matter

White-Labeling for Clients - Different branding, color schemes, or design systems per client

Licensing Models - Open-source vs. commercial component libraries (e.g., free tier uses Bootstrap, paid tier gets Telerik)

Performance Profiles - Use a lighter UI (e.g., Bootstrap) for mobile users or emerging markets

Department Preferences - Marketing prefers Bootstrap, IT prefers MudBlazor, Finance uses Syncfusion grids

Testing & Prototyping - Try out newer libraries like AntDesign or Blazorise without affecting production

What Stays the Same?

Your business logic, services, models, and data access all stay untouched. Only the UI layer adapts — and it does so dynamically.

Business Benefits at a Glance

🎯 One Core System - Build once, adapt visually for each use case

🎨 Custom Branding - Deliver branded UIs for clients, partners, or internal teams

🏎️ Optimised Performance - Load only what's needed — faster apps, lower hosting costs

💸 Reduce Cost & Risk - Avoid duplicated code, multiple deployments, and diverging branches

🔁 Future-Proofing - Swap or test new frameworks (e.g., DevExpress, AntDesign) without lock-in

How It Works (High-Level)

UI Components are separated into modular units (via Razor Class Libraries)

Configuration settings determine which UI framework is used (e.g., "MudBlazor", "Telerik", "Syncfusion")

At runtime, only the relevant UI assets, scripts, and libraries are downloaded

The app looks and feels different — but the backend remains the same

🔀 One System, Many UI Experiences — All Configurable

With Assemblysoft’s modular Blazor architecture, every part of your application can be independently configured to use the UI framework that best suits its audience or purpose — all while sharing the same backend, services, and business rules.

For example, you could:

• ✅ Use Bootstrap for a fast-loading, minimal public portal
• ✅ Use Telerik for a polished enterprise dashboard
• ✅ Use Syncfusion where complex data grids or export capabilities are essential
• ✅ Use MudBlazor internally for teams that prefer a modern, material design system

And here's the key:
Each of these areas could be configured to use any supported UI framework — not just the one listed above.

Whether it's your dashboard, portal, admin panel, or internal tools, each can run its own UI framework without duplicating code or forking the application.

💡 All without rewriting the application.

Each UI layer is:

• 🔧 Configurable at runtime or per deployment
• 🐇 Lazily loaded to avoid unnecessary bloat
• 🔄 Connected to the same service and data infrastructure

📱 Extend Your Blazor App with .NET MAUI Blazor Hybrid

Your UI flexibility doesn't stop at the browser. With .NET MAUI Blazor Hybrid, you can bring your existing Blazor components to desktop and mobile platforms — without rewriting your codebase.

Blazor Hybrid allows you to:

• 📱 Run your Blazor UI inside a native mobile or desktop app (Windows, macOS, Android, iOS)
• 🔄 Reuse your existing components and service layer
• 🧩 Plug in any of the supported UI frameworks (MudBlazor, Telerik, Bootstrap, etc.) — just like on the web
• 🔐 Secure and distribute apps via native app stores or enterprise channels

Why this matters:

• You can deliver a consistent experience across web, desktop, and mobile — with tailored UI frameworks per platform.
• For example, use Telerik in your enterprise web dashboard and MudBlazor for your internal MAUI field app — all from a shared codebase.

Whether you're building public-facing portals, internal tools, or offline-capable mobile apps, .NET MAUI Blazor Hybrid provides the reach you need, while preserving the architecture you've already invested in.

Assemblysoft helps clients bring their Blazor apps to mobile and desktop using .NET MAUI — with runtime UI framework selection intact.

🔗 Talk to us about cross-platform Blazor

🔄 Introducing or Swapping UI Frameworks Per Client or Scenario

With a modular Blazor architecture, you gain the ability to introduce a new UI framework or swap out an existing one — without disrupting the entire application or duplicating code.

This makes it easy to tailor the user experience for specific clients, brands, or business contexts. Here's a practical example:

🧠 Example: A Blazor App with 3 Client-Specific UIs

Each of these UIs:

• Uses the same shared backend, services, and data models
• Loads only the assets needed for its specific UI framework (via lazy loading)
• Can be configured at runtime or per deployment

🔧 Adding a New Framework Later — No Rebuild Required

Let’s say a new client joins and they prefer a different visual style — for example, something that matches their brand guidelines or internal systems.

With our flexible setup, we don’t need to rebuild the entire application. Instead, we simply:

1. Add a new design layer that matches their preferred look and feel
2. Connect it to the existing logic and features already powering the application
3. Set up the app to use that new design automatically for that specific client

Once this quick setup process is complete, switching between design frameworks becomes as easy as changing a setting.
Need to go back to a previous style? Just update the configuration — no code changes required.

The result?
The new client sees the app exactly how they want — while everything underneath (data, workflows, and business rules) stays the same.

This means we can support different clients with completely different user experiences — all from the same core system, and without costly redevelopment.

🪄 Swap Anytime, Without a full Rewrite

Need to replace MudBlazor with Blazorise for your internal tools? No problem.
Want to try DevExpress for reporting? Just configure it for your reporting module.

Each part of the application can evolve independently, which means your app becomes more adaptable, testable, and maintainable — long term.

All powered by the same codebase, running in the same hosting environment — saving you money, time, and stress.

Why Assemblysoft?

We’re not just Blazor experts — we’re business enablers. At Assemblysoft, we build Blazor apps that:

✅ Support multiple brands or teams

✅ Perform at scale across devices

✅ Are maintainable, testable, and future-ready

🔗 Learn more about our Blazor solutions
🔗 Partner with Assemblysoft today