IdentityServer4 QuickStart2_ResourceOwnerPasswords System.Net.Http.HttpRequestException

Question

我正在尝试运行QuickStart2_ResourceOwnerPasswords示例。我可以毫无问题地查看http://localhost:5000/.well-known/openid-configuration。但是，当我从控制台运行Client.dll时，出现以下错误：

Unhandled Exception: System.Net.Http.HttpRequestException: An error occurred while sending the request. ---> System.Net.Http.WinHttpException: A connection with the server could not be established
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Threading.Tasks.RendezvousAwaitable`1.GetResult()
   at System.Net.Http.WinHttpHandler.<StartRequest>d__105.MoveNext()

感谢您的帮助！

注意：我正在运行QuickStartIdentityServer作为启动项目（这将在后台运行Identity Server实施，并在命令窗口中显示日志）。我目前正在使用以下命令从单独的窗口运行Client.dll：

dotnet Client.dll

不确定这是否是正确的测试方法...