SeppPenner/Startup.cs

## _Host.cshtml
@page "/"
@namespace TestApplication
@addTagHelper *, Microsoft.AspNetCore.Mvc.TagHelpers

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>TestApplicationl</title>
    <base href="~/" />
    <environment include="Development">
        <link rel="stylesheet" href="css/bootstrap/bootstrap.min.css" />
    </environment>
    <environment exclude="Development">
        <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css"
              asp-fallback-href="css/bootstrap/bootstrap.min.css"
              asp-fallback-test-class="sr-only" asp-fallback-test-property="position" asp-fallback-test-value="absolute"
              crossorigin="anonymous"
              integrity="sha384-ggOyR0iXCbMQv3Xipma34MD+dH/1fQ784/j6cY/iJTQUOhcWr7x9JvoRxT2MZw1T"/>
    </environment>
    <link href="css/site.css" rel="stylesheet" />
</head>
<body>
    <app>@(await Html.RenderComponentAsync<App>())</app>

    <script src="_framework/blazor.server.js"></script>
</body>
</html>

## Startup.cs
namespace Example.Application
{
    using Microsoft.AspNetCore.Builder;
    using Microsoft.AspNetCore.Hosting;
    using Microsoft.AspNetCore.Mvc.Razor;
    using Microsoft.EntityFrameworkCore;
    using Microsoft.Extensions.Configuration;
    using Microsoft.Extensions.DependencyInjection;
    using Microsoft.Extensions.Hosting;

    public class Startup
    {
        public Startup(IConfiguration configuration)
        {
            this.Configuration = configuration;
        }

        public IConfiguration Configuration { get; }

        public void ConfigureServices(IServiceCollection services)
        {
            services.AddDbContext<ApplicationDbContext>(options =>
                options.UseSqlServer(this.Configuration.GetConnectionString("SqlServerConnection")));

            services.AddDefaultIdentity<IdentityUser>()
                .AddEntityFrameworkStores<ApplicationDbContext>();

            services.AddRazorPages();
            services.AddServerSideBlazor();

            services.AddLocalization(options => options.ResourcesPath = "Translations");

            services.AddSignalR();

            //services.AddMvc(options => options.EnableEndpointRouting = false).AddViewLocalization(LanguageViewLocationExpanderFormat.Suffix).AddDataAnnotationsLocalization();
        }

        public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
        {
            if (env.IsDevelopment())
            {
                app.UseDeveloperExceptionPage();
                app.UseDatabaseErrorPage();
            }
            else
            {
                app.UseExceptionHandler("/Home/Error");

                // The default HSTS value is 30 days. You may want to change this for production scenarios, see https://aka.ms/aspnetcore-hsts.
                app.UseHsts();
            }

            app.UseHttpsRedirection();

            app.UseStaticFiles();

            app.UseRouting();

            app.UseAuthentication();
            app.UseAuthorization();

            app.UseEndpoints(endpoints =>
            {
                endpoints.MapControllers();
                endpoints.MapBlazorHub();
                endpoints.MapFallbackToPage("/_Host");
            });

            //app.UseMvc();
        }
    }
}

## TestComponent.razor
@using Microsoft.AspNetCore.Mvc.Localization

@inject IViewLocalizer Localizer

<table class="table">
    <thead>
        <tr>
            <th scope="col">@Localizer["Date"]</th>
        </tr>
    </thead>
    <tbody>
            <tr>
                <td>a</td>
                <td>b</td>
            </tr>
    </tbody>
</table>
	@page "/"
	@namespace TestApplication
	@addTagHelper *, Microsoft.AspNetCore.Mvc.TagHelpers

	<!DOCTYPE html>
	<html lang="en">
	<head>
	<meta charset="utf-8" />
	<meta name="viewport" content="width=device-width, initial-scale=1.0" />
	<title>TestApplicationl</title>
	<base href="~/" />
	<environment include="Development">
	<link rel="stylesheet" href="css/bootstrap/bootstrap.min.css" />
	</environment>
	<environment exclude="Development">
	<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css"
	asp-fallback-href="css/bootstrap/bootstrap.min.css"
	asp-fallback-test-class="sr-only" asp-fallback-test-property="position" asp-fallback-test-value="absolute"
	crossorigin="anonymous"
	integrity="sha384-ggOyR0iXCbMQv3Xipma34MD+dH/1fQ784/j6cY/iJTQUOhcWr7x9JvoRxT2MZw1T"/>
	</environment>
	<link href="css/site.css" rel="stylesheet" />
	</head>
	<body>
	<app>@(await Html.RenderComponentAsync<App>())</app>

	<script src="_framework/blazor.server.js"></script>
	</body>
	</html>
	namespace Example.Application
	{
	using Microsoft.AspNetCore.Builder;
	using Microsoft.AspNetCore.Hosting;
	using Microsoft.AspNetCore.Mvc.Razor;
	using Microsoft.EntityFrameworkCore;
	using Microsoft.Extensions.Configuration;
	using Microsoft.Extensions.DependencyInjection;
	using Microsoft.Extensions.Hosting;

	public class Startup
	{
	public Startup(IConfiguration configuration)
	{
	this.Configuration = configuration;
	}

	public IConfiguration Configuration { get; }

	public void ConfigureServices(IServiceCollection services)
	{
	services.AddDbContext<ApplicationDbContext>(options =>
	options.UseSqlServer(this.Configuration.GetConnectionString("SqlServerConnection")));

	services.AddDefaultIdentity<IdentityUser>()
	.AddEntityFrameworkStores<ApplicationDbContext>();

	services.AddRazorPages();
	services.AddServerSideBlazor();

	services.AddLocalization(options => options.ResourcesPath = "Translations");

	services.AddSignalR();

	//services.AddMvc(options => options.EnableEndpointRouting = false).AddViewLocalization(LanguageViewLocationExpanderFormat.Suffix).AddDataAnnotationsLocalization();
	}

	public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
	{
	if (env.IsDevelopment())
	{
	app.UseDeveloperExceptionPage();
	app.UseDatabaseErrorPage();
	}
	else
	{
	app.UseExceptionHandler("/Home/Error");

	// The default HSTS value is 30 days. You may want to change this for production scenarios, see https://aka.ms/aspnetcore-hsts.
	app.UseHsts();
	}

	app.UseHttpsRedirection();

	app.UseStaticFiles();

	app.UseRouting();

	app.UseAuthentication();
	app.UseAuthorization();

	app.UseEndpoints(endpoints =>
	{
	endpoints.MapControllers();
	endpoints.MapBlazorHub();
	endpoints.MapFallbackToPage("/_Host");
	});

	//app.UseMvc();
	}
	}
	}
	@using Microsoft.AspNetCore.Mvc.Localization

	@inject IViewLocalizer Localizer

	<table class="table">
	<thead>
	<tr>
	<th scope="col">@Localizer["Date"]</th>
	</tr>
	</thead>
	<tbody>
	<tr>
	<td>a</td>
	<td>b</td>
	</tr>
	</tbody>
	</table>