如何在我的视图ASP.NET核心中加载外部网站

using Microsoft.AspNetCore.Mvc;

public class ExternalWebsiteController : Controller
{
    public IActionResult Index()
    {
        return View();
    }
}

@{
    ViewData["Title"] = "External Website";
}

<h1>External Website</h1>

<iframe src="https://www.example.com" width="100%" height="500"></iframe>

using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.Extensions.DependencyInjection;

public class Startup
{
    public void ConfigureServices(IServiceCollection services)
    {
        services.AddMvc();
    }

    public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
    {
        app.UseRouting();

        app.UseEndpoints(endpoints =>
        {
            endpoints.MapControllerRoute(
                name: "default",
                pattern: "{controller=Home}/{action=Index}/{id?}");
        });
    }
}