Blazor Shared Features
One codebase, every render mode
- C# Everywhere — Build full web applications using C# and .NET for both client and server, sharing components across render modes
- Enhanced Security — Server-side code stays on the server; client-side WebAssembly runs in the browser sandbox with the .NET runtime’s memory safety guarantees
- Component Reusability — Same Razor components can render Server, WebAssembly, Auto, or Static SSR — pick the mode per page
- Optimized Infrastructure — IIS 10 tuned for SignalR WebSockets and WebAssembly delivery (Brotli + HTTP/3)
Complete Blazor Hosting Solutions
Blazor Server Hosting
Server-side UI rendering with persistent SignalR WebSocket connections. Faster initial load, real-time UI updates over the SignalR circuit, full server-side .NET API access, dedicated IIS app pools sized for per-user state.
Blazor WebAssembly Hosting
Client-side Blazor via WebAssembly with offline capabilities. Run C# in the browser, build Progressive Web Apps with service workers, reduced server load, optimized static file delivery with Brotli + HTTP/3 and AOT-friendly handlers.
Blazor Auto & Static SSR
The .NET 8+ unified render modes: render initial HTML server-side via Static SSR, hand off to Blazor Server for early interactivity, then transition to Blazor WebAssembly once the runtime downloads. SEO-friendly and progressive.
Blazor Hosting Models Comparison
Which mode for which workload?
- Blazor Server: Very fast initial load, server execution, no offline, requires persistent SignalR connection, works on all browsers including older ones
- Blazor WebAssembly: Slower initial load (downloads .NET runtime), client execution, PWA capable, lower server resource needs, requires WebAssembly-compatible browser
- Blazor Auto: Best of both — instant server interactivity, transitions to WebAssembly once cached, .NET 8+
- Static SSR with islands: Server-rendered HTML with selective interactivity, SEO-friendly, lowest client resource demand
Documentation & Microsoft Resources
Official Blazor references
- Blazor overview — Microsoft official documentation
- Render modes explained — Server / WebAssembly / Auto / Static SSR
- Host and deploy Blazor — Microsoft official deployment guide
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