TildeCompare

A small ASP.NET Core 10 sample that places MVC / Razor Pages, a View Component, and a Blazor Web App (Static SSR + Interactive Server + Interactive WebAssembly) side by side under a non-trivial PathBase (/myapp), so the behavior of ~/ (in .cshtml) can be compared directly with @Assets[...] (in .razor) for an identical scenario matrix.

The motivating question: if Blazor adds compile-time ~/ → Assets[...] expansion, will it mean the same thing as ~/ in .cshtml? This app makes the answer concrete.

Run it

dotnet run --project TildeCompare --launch-profile http

Then visit:

Surface	URL
Landing page	http://localhost:5095/myapp/
MVC / Razor Pages compare	http://localhost:5095/myapp/Compare
Blazor — Static SSR	http://localhost:5095/myapp/blazor/compare-ssr
Blazor — Interactive Server	http://localhost:5095/myapp/blazor/compare-server
Blazor — Interactive WebAssembly	http://localhost:5095/myapp/blazor/compare-wasm
Razor Pages /counter (page-route target)	http://localhost:5095/myapp/counter
Blazor /counter (page-route target)	http://localhost:5095/myapp/blazor/counter

The app is intentionally mounted under PathBase = /myapp (see Program.cs) so PathBase-prefixing behavior is visible in the rendered HTML.

Scenario matrix (per surface)

• Static asset URLs across the URL-resolution allowlist: <img src>, <link href>, <script src>, <a href>, <source srcset>, <form action>.
• Page-route targets: <a href="~/counter">, <a href="~/Compare?x=1">.
• Non-URL attributes (outside the allowlist): <div title>, <div data-url>.
• Programmatic features: Url.Content("~/...") (MVC), NavigationManager.ToAbsoluteUri(...) (Blazor), Assets["..."] (Blazor), a [ViewComponent] that re-emits a ~/-prefixed string from a C# model (MVC), and a partial view (MVC).
• Component parameter forwarding: a small AssetCard Blazor component that re-emits whatever its caller passed to it.

Findings

A written-up summary of what the rendered HTML actually shows (with the surprising and the unsurprising parts called out) is in FINDINGS.md. Raw rendered HTML for each surface is in snapshots/.