c# - Pass async Callback to Timer constructor

Question

I have async callback, which is passed into Timer(from System.Threading) constructor :

private async Task HandleTimerCallback(object state)
{
    if (timer == null) return;

    if (asynTaskCallback != null)
    {
        await HandleAsyncTaskTimerCallback(state);
    }
    else
    {
        HandleSyncTimerCallback(state);
    }
}

And Timer :

timer = new Timer(async o => await HandleTimerCallback(o), state, CommonConstants.InfiniteTimespan,
            CommonConstants.InfiniteTimespan);

Is there any way to omit that o param in lambda? Cause for not-async I can just pass my handler as delegate

 timer = new Timer(HandleTimerCallback, state, CommonConstants.InfiniteTimespan,
            CommonConstants.InfiniteTimespan);

question from:https://stackoverflow.com/questions/38917818/pass-async-callback-to-timer-constructor

Answer 1

Is there any way to omit that o param in lambda?

Sure, just define your event handler method as async void:

private async void HandleTimerCallback(object state)