Blazor router

App.razor

<CascadingAuthenticationState>
    <Router AppAssembly="@typeof(App).Assembly">
        <Found Context="routeData">
            <ExtendedErrorBoundary @ref="errorBoundary">
                <ChildContent>
                    <ExtendedAuthorizeRouteView RouteData="@routeData" DefaultLayout="@typeof(MainLayout)" NotAuthorizedLayout="@typeof(ErrorLayout)">
                        <NotAuthorized>
                            @if (context.User.Identity?.IsAuthenticated != true)
                            {
                                <Server.Pages.Login Reload="true" />
                            }
                            else
                            {
                                <Error403 />
                            }
                        </NotAuthorized>
                    </ExtendedAuthorizeRouteView>
                    <FocusOnNavigate RouteData="@routeData" Selector="h1"/>
                </ChildContent>
                <ErrorContent>
                    <LayoutView Layout="@typeof(ErrorLayout)">
                        <Error500 Exception="@context" RecoverRequest="() => errorBoundary.Recover()"/>
                    </LayoutView>
                </ErrorContent>
            </ExtendedErrorBoundary>
        </Found>
        <NotFound>
            <LayoutView Layout="@typeof(ErrorLayout)">
                <Error404 />
            </LayoutView>
        </NotFound>
    </Router>
</CascadingAuthenticationState>

@code {
    private ErrorBoundary errorBoundary = default!;
}