App.razor

<CascadingAuthenticationState>
    <Blazorise.ThemeProvider Theme="@theme">
        <Router AppAssembly="@typeof(Program).Assembly" PreferExactMatches="@true">
            <Found Context="routeData">
                <AuthorizeRouteView RouteData="@routeData" DefaultLayout="@typeof(MainLayout)">
                    <NotAuthorized>
                        <MythicNights.Pages.RedirectToLogin />
                    </NotAuthorized>
                </AuthorizeRouteView>
            </Found>
            <NotFound>
                <LayoutView Layout="@typeof(MainLayout)">
                    <p>Sorry, there's nothing at this address.</p>
                </LayoutView>
            </NotFound>
        </Router>
    </Blazorise.ThemeProvider>
</CascadingAuthenticationState>

@code{
    private Theme theme = new Theme
    {
        // theme settings
    };
}