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Day 31Sprint 4 • Full Stack .NET & Blazor
2 Hours
Day 31: Full Stack Blazor WebAssembly Setup, Components & State
Blazor is Microsoft's game-changing UI framework that lets you build modern, interactive single-page web applications (SPAs) using C# instead of JavaScript. In Blazor WebAssembly, your compiled C# assemblies run directly client-side inside the browser sandbox using standard WebAssembly (Wasm).
Understand how Blazor runs real C# directly inside the browser using WebAssembly
Create interactive Razor components (.razor) with @code blocks and two-way data binding (@bind)
Manage component lifecycle methods (OnInitializedAsync, StateHasChanged)
Consume backend REST APIs directly in C# using HttpClient in the browser
Core Architectural Insights
- Blazor WebAssembly runs compiled .NET code client-side without any browser plugins
- Share C# DTO records and validation logic directly between your backend and frontend
- Razor syntax combines HTML markup with inline C# expressions using the @ symbol
- SignalR enables real-time two-way web socket communication with zero polling
Real-World Developer Analogy
Historically, building full-stack apps was like having to speak Spanish (JavaScript) in the front yard and German (C#) inside the house. Blazor lets you speak your favorite native language (C#) everywhere—both in the browser and on the server—sharing the exact same models and logic.