如何将路由绑定到asp.net-core / Kestrel中的特定端口

Question

在asp.net Web API中，可以将具有特定端口的路由映射到控制器，如下所示：

public void Run1()
{
    HttpConfiguration config = new HttpConfiguration();
    ...
    config.Routes.MapHttpRoute(
       name: "Controller1",
       routeTemplate: "{action}",
       defaults: new { controller = "Controller1" }
    );

    Microsoft.Owin.Hosting.WebApp.Start("http://localhost:9000/base1/", config);
}

public void Run2()
{
    HttpConfiguration config = new HttpConfiguration();
    ...
    config.Routes.MapHttpRoute(
       name: "Controller2",
       routeTemplate: "{action}",
       defaults: new { controller = "Controller3" }
    );

    Microsoft.Owin.Hosting.WebApp.Start("http://localhost:9000/base2/", config);
}

public void Run3()
{
    HttpConfiguration config = new HttpConfiguration();
    ...
    config.Routes.MapHttpRoute(
       name: "Controller3",
       routeTemplate: "{action}",
       defaults: new { controller = "Controller3" }
    );

    Microsoft.Owin.Hosting.WebApp.Start("http://localhost:9050/base3/", config);
}

Run1();
Run2();
Run3();

这给出了三种不同的路线：

http://localhost:9000/base1/SomeAction -> SomeAction on Controller1
http://localhost:9000/base2/SomeAction -> SomeAction on Controller2
http://localhost:9050/base3/SomeAction -> SomeAction on Controller3

如何在Asp.net Core中使用Kestrel完成此操作？

我知道，我可以指定隼监听与端口IWebHostBuilder.UseUrls并与基本路径IApplicationBuilder.UsePathBase。但是，如何将路由映射到特定端口？

另外：似乎Kestrel（与Katana相反）不能在同一端口上多次运行（请参阅Run1和Run2）。有人可以确认吗？