我正在运行来自Scott Allen的ASP.Net基础课程的以下代码
using System;
using Microsoft.Owin.Hosting;
using Owin;
namespace ConsoleApplication1
{
class Program
{
static void Main(string[] args)
{
string uri = "http://localhost:8080";
using (WebApp.Start<Startup>(uri))
{
Console.WriteLine("Started!");
Console.ReadKey();
Console.WriteLine("Stopping!");
}
}
}
public class Startup
{
public void Configuration(IAppBuilder app)
{
app.UseWelcomePage();
//app.Run(
// ctx => ctx.Response.WriteAsync("Hello Owin!"));
}
}
}
然而，当我运行控制台应用时，我会收到一条消息。
Unhandled Exception: System.Reflection.TargetInvocationException: Exception has
been thrown by the target of an invocation. ---> System.Net.HttpListenerExceptio
n: Failed to listen on prefix 'http://localhost:8080/' because it conflicts with
an existing registration on the machine.
at System.Net.HttpListener.AddAllPrefixes()
at System.Net.HttpListener.Start()
at Microsoft.Owin.Host.HttpListener.OwinHttpListener.Start(HttpListener liste
ner, Func`2 appFunc, IList`1 addresses, IDictionary`2 capabilities, Func`2 logge
rFactory)
at Microsoft.Owin.Host.HttpListener.OwinServerFactory.Create(Func`2 app, IDic
tionary`2 properties)
--- End of inner exception stack trace ---
at System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] arguments,
Signature sig, Boolean constructor)
at System.Reflection.RuntimeMethodInfo.UnsafeInvokeInternal(Object obj, Objec
t[] parameters, Object[] arguments)
at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invoke
Attr, Binder binder, Object[] parameters, CultureInfo culture)
at Microsoft.Owin.Hosting.ServerFactory.ServerFactoryAdapter.Create(IAppBuild
er builder)
at Microsoft.Owin.Hosting.Engine.HostingEngine.StartServer(StartContext conte
xt)
at Microsoft.Owin.Hosting.Engine.HostingEngine.Start(StartContext context)
at Microsoft.Owin.Hosting.Starter.DirectHostingStarter.Start(StartOptions opt
ions)
at Microsoft.Owin.Hosting.Starter.HostingStarter.Start(StartOptions options)
at Microsoft.Owin.Hosting.WebApp.StartImplementation(IServiceProvider service
s, StartOptions options)
at Microsoft.Owin.Hosting.WebApp.Start(StartOptions options)
at Microsoft.Owin.Hosting.WebApp.Start[TStartup](StartOptions options)
at Microsoft.Owin.Hosting.WebApp.Start[TStartup](String url)
at ConsoleApplication1.Program.Main(String[] args) in e:\EShared\Dev2015\WebA
ppScottAllen\ConsoleApplication1\ConsoleApplication1\Program.cs:line 12
Press any key to continue . . .
我从任务管理器的性能选项卡运行资源监视器，可以看到8080上有2个监听端口条目。
两个都具有图像=系统，PID=4，IPv6未指定，协议TCP，防火墙状态不允许，未受限制。
我对监听端口不够熟悉，如何让代码运行？