手动初始化具有Dependence Injected参数的单例

Question

我的环境是，Asp.net5，MVC6。我想定期使用SingalR向客户端广播一些服务器端信息。我创造了一个＆＃34; Braodcaster＆＃34;像这样，

public class ServerInfoHub : Hub
{

}

public class Broadcaster
{
    private readonly Timer looper;
    private readonly IHubContext hubContext;
    private readonly PerformanceCounter cpuCounter;
    private readonly PerformanceCounter ramCounter;
    private static Broadcaster instance;

    public Broadcaster(IHubContext hubContext)
    {
        this.hubContext = hubContext;
        cpuCounter = new PerformanceCounter("Processor", "% Processor Time", "_Total");
        ramCounter = new PerformanceCounter("Memory", "Available MBytes");
        looper = new Timer(new TimerCallback(onTimer), this, TimeSpan.Zero, TimeSpan.FromSeconds(2));
    }

    private void onTimer(object target)
    {
        hubContext.Clients.All.broadcastMessage(ramCounter.NextValue(), cpuCounter.NextValue());
    }
}

在Startup.cs中将其作为单身人士（＆＃34; Broadcaster＆＃34;）

        public void ConfigureServices(IServiceCollection services)
    {
        //ignored unrelated code
        services.AddSingleton(_ => new Broadcaster(GlobalHost.ConnectionManager.GetHubContext<ServerInfoHub>()));
    }

虽然，我想要这个＆＃34; Broadcaster＆＃34;在应用程序启动时初始化。而且，＆＃34; Broadcaster＆＃34;没有其他依赖它的模块，＆＃34; Braodcaster＆＃34;取决于＆＃34; IHubContext＆＃34;，这意味着我可能无法创建静态的＆＃39; CreateInstance＆＃39; ＆＃39; Broadcaster＆＃39;中的方法并在Startup.cs中直接调用它，就像这样

public class Broadcaster
{
 private static Broadcaster instance;


    public static void CreateInstance()
    {
        if(instance == null)
        {
            instance = new Broadcaster(???);
        }
    }

    private Broadcaster(IHubContext hubContext) {}
}

我怎样才能实现它？