blackjack/Components/Routes.razor

@using Microsoft.AspNetCore.Components.Web
@using Microsoft.AspNetCore.Components.Routing

<Router AppAssembly="@typeof(Program).Assembly">
    <Found Context="routeData">
        @if (routeData.PageType.Name == "Index" || string.IsNullOrEmpty(routeData.PageType.Name))
        {
            <Navigate href="/blackjack" />
        }
        else
        {
            <RouteView RouteData="@routeData" />
        }
    </Found>
    <NotFound>
        <PageTitle>Не найдено</PageTitle>
        <p role="alert">Извините, страница не найдена.</p>
    </NotFound>
</Router>