.NET Core：多樣的宿主

　　 .NET Core 可以以以下方式作為宿主運行：

1. IIS
2. 控制台
3. Windows服務

　　運行啟動代碼：

        public static void Main(string[] args)

        {

            try

            {

                LogCenter.Info("系統啟動");

                LoadConfig();

                bool isService = !(Debugger.IsAttached ||  args.Contains("--console"));

                if (isService)

                {

                    CreateWebHostBuilder(args).Build().RunAsService();

                }

                else

                {

                    CreateWebHostBuilder(args).Build().Run();

                }

            }

            catch (Exception ex)

            {

                LogCenter.Error(ex);

            }

        }