Blazor Router NotFound page doesn't redirect to notfound page

[Schoof-T]

Is there an existing issue for this?

• I have searched the existing issues

Describe the bug

I have a Blazor InteractiveServer .NET 10 project, and I added NotFoundPage="typeof(Pages.NotFound)" to the Routes.razor page.

I also have a NotFound.razor page.

@page "/not-found"
@layout MainLayout

<h3>Not Found</h3>
<p>Sorry, the content you are looking for does not exist.</p>

When I navigate to an unkown URL, I just get the default not found page.

Expected Behavior

I expect the NotFound page to be rendered when I navigate to an unkown page.

Steps To Reproduce

• Add NotFoundPage="typeof(Pages.NotFound)" to the Routes.razor page.

<Router AppAssembly="typeof(Program).Assembly" NotFoundPage="typeof(Pages.NotFound)">
    <Found Context="routeData">
        <RouteView RouteData="routeData" DefaultLayout="typeof(Layout.MainLayout)" />
        <FocusOnNavigate RouteData="routeData" Selector="h1" />
    </Found>
</Router>

• Create a NotFound.Razor page

@page "/not-found"
@layout MainLayout

<h3>Not Found</h3>
<p>Sorry, the content you are looking for does not exist.</p>

Exceptions (if any)

No response

.NET Version

10

Anything else?

Blazor InteractiveServer

[MihuBot]

I'm a bot. Here is a possible related and/or duplicate issue (I may be wrong):

• NotFoundPage does not work in .NET 10 #62404

[Schoof-T]

I had to add this line to the Program.cs

app.UseStatusCodePagesWithReExecute("/not-found", "?statusCode={0}");