Blazor

Blazor allows writing web UIs in C# instead of JavaScript. .NET 9 (2024/2025) brings unified rendering modes (Server, WebAssembly, Auto).

When to Use

• .NET Shops: Sharing code (Models/DTOs) between Backend and Frontend.
• Internal Apps: Rapid development for enterprise tools.
• WebAssembly: Running compiled C# in the browser.

Core Concepts

Blazor Server

UI logic runs on server, updates sent via SignalR. Low latency, requires connection.

Blazor WebAssembly

Runs client-side (DLLs downloaded). Offline support.

Interactive Components

Razor syntax (@code { ... }) combining HTML and C#.

Best Practices (2025)

Do:

• Use Auto mode: Load fast (Server), then switch to WASM (Client) in background.
• Use QuickGrid: High performance data grid component.
• Use Component Libraries: MudBlazor/Radzen for material UI.

Don't:

• Don't block the UI thread: Use await for long implementations.

References

• Blazor Documentation