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Tag: blazor

7 posts

2026-05-12 errors csharp dotnet

Fix: RZ10012: Found markup element with unexpected name in Blazor

Blazor's Razor compiler emits RZ10012 when a PascalCase tag has no matching component type in scope. Add @using for the component's namespace in _Imports.razor, or @namespace in the component, then rebuild.

2026-05-08 dotnet webassembly performance

Copilot Studio's .NET 10 WebAssembly upgrade: 20% cold path, 5% warm

Microsoft moved Copilot Studio's WASM engine from .NET 8 to .NET 10. The dual JIT/AOT package, fingerprinting, and WasmStripILAfterAOT explain the numbers.

2026-05-03 blazor blazor-webassembly tailwind-css

How to use Tailwind CSS with Blazor WebAssembly in .NET 11

A complete .NET 11 setup for Tailwind CSS v4 in a Blazor WebAssembly app: standalone CLI (no Node), MSBuild target, @source directives for Razor and CSS isolation files, and a publish pipeline that survives Native AOT.

2026-04-29 blazor blazor-webassembly aspnetcore-11

How to share validation logic between server and Blazor WebAssembly

The single biggest source of validation drift in a Blazor WebAssembly + ASP.NET Core app is the urge to write the rules twice. This guide walks the only layout that scales in .NET 11: a Shared class library that owns the DTOs and their validators, consumed by both the WASM client (EditForm + DataAnnotationsValidator or Blazored.FluentValidation) and the server (minimal API endpoint filter or MVC model binding), with a tested round-trip that maps server-side ValidationProblemDetails back into the EditContext.

2026-04-16 blazor aspnet-core dotnet-11

Blazor Virtualize Finally Handles Variable-Height Items in .NET 11

ASP.NET Core in .NET 11 Preview 3 teaches the Virtualize component to measure items at runtime, fixing the spacing and scroll jitter that uniform-height assumptions caused.

2026-04-13 blazor aspnet-core dotnet-11

Blazor SSR Finally Gets TempData in .NET 11

ASP.NET Core in .NET 11 Preview 2 brings TempData to Blazor static server-side rendering, enabling flash messages and Post-Redirect-Get flows without workarounds.

2026-04-05 dotnet-11 blazor webassembly

dotnet new webworker: first-class Web Workers for Blazor in .NET 11 Preview 2

A new project template in .NET 11 Preview 2 scaffolds the JS plumbing, WebWorkerClient, and JSExport boilerplate needed to run .NET code in a browser Web Worker.