.net core 简单定时程序

 using Microsoft.Extensions.Configuration;
 using Microsoft.Extensions.Hosting;
 using Orleans;
 using Star.Helpers;
 using Star.IModuleServices.Common.Interfaces.System;
 using Star.IModuleServices.Common.Models.System.SettingHotUpdate.Responses;
 using System;
 using System.Collections.Concurrent;
 using System.Collections.Generic;
 using System.Threading;
 using System.Threading.Tasks;
 using Star.Service.Project.Admin.Tool.ConfigTime;
 namespace Star.Service.Project.Admin.Tool.ConfigTime
 {
     /// <summary>
     /// 简单的定时任务执行
     /// </summary>
     public class TimedExecutService : BackgroundService
     {
         protected override async Task ExecuteAsync(CancellationToken stoppingToken)
         {
             try
             {
                 Console.WriteLine(DateTime.Now.ToString() + "BackgroundService：启动");

                 while (!stoppingToken.IsCancellationRequested)
                 {
                     await Task.Delay(, stoppingToken); //启动后5秒执行一次 (用于测试)
                     //数据源
                     ApiResult<List<SysSettingHotUpdateResponseDto>> list = new ApiResult<List<SysSettingHotUpdateResponseDto>>();
                     try
                     {
                         var cluster = Ioc.GetService<IClusterClient>();
                         list = await cluster.GetGrain<ISysSettingHotUpdate>().GetList("Star.Service.Project.Admin");
                     }
                     catch (Exception ex)
                     {
                         throw new Exception("未获取到相关配置:" + ex.Message);
                     }

                     if (list.Data.Count <= )
                     {
                         throw new Exception("未获取到相关配置");
                     }
                     //自定义数据处理
                     ConfigData.Data = new ConcurrentDictionary<string, string>();
                     list.Data.ForEach(c =>
                     {
                         ConfigData.Data[c.K] = c.V;
                     });
                     Console.WriteLine(DateTime.Now.ToString() + " 执行逻辑");
                 }
                 Console.WriteLine(DateTime.Now.ToString() + "BackgroundService：停止");
             }
             catch (Exception ex)
             {
                 if (!stoppingToken.IsCancellationRequested)
                 {
                     Console.WriteLine(DateTime.Now.ToString() + "BackgroundService：异常" + ex.Message + ex.StackTrace);
                 }
                 else
                 {
                     Console.WriteLine(DateTime.Now.ToString() + "BackgroundService：停止");
                 }
             }
         }

     }
 }

注入定时任务：
services.AddSingleton<Microsoft.Extensions.Hosting.IHostedService, TimedExecutService>();