如何在.net Core3.0中并行运行多个BackgroundService？

// 1. 创建BackgroundService类
public class MyBackgroundService : BackgroundService
{
    protected override async Task ExecuteAsync(CancellationToken stoppingToken)
    {
        // 这里编写后台任务的逻辑
        while (!stoppingToken.IsCancellationRequested)
        {
            // 执行后台任务的代码
            await Task.Delay(1000, stoppingToken); // 模拟后台任务的延迟
        }
    }
}

// 2. 注册BackgroundService
public void ConfigureServices(IServiceCollection services)
{
    // 其他服务的配置
    // ...

    // 注册BackgroundService
    services.AddHostedService<MyBackgroundService>();
    services.AddHostedService<AnotherBackgroundService>();
}

// 3. 程序入口
public static async Task Main(string[] args)
{
    var host = CreateHostBuilder(args).Build();

    // 运行后台任务
    using (var serviceScope = host.Services.CreateScope())
    {
        var services = serviceScope.ServiceProvider;
        try
        {
            var backgroundServices = services.GetServices<IHostedService>();
            foreach (var backgroundService in backgroundServices)
            {
                await backgroundService.StartAsync(CancellationToken.None);
            }
        }
        catch (Exception ex)
        {
            // 错误处理
        }
    }

    await host.RunAsync();
}

// 4. 启动应用程序
public static IHostBuilder CreateHostBuilder(string[] args) =>
    Host.CreateDefaultBuilder(args)
        .ConfigureServices((hostContext, services) =>
        {
            // 其他服务的配置
            // ...
        });