signal from pipeline to consumer

public class SomePipeline
{
    public bool Finished { get; set; }
    private EventWaitHandle _finishedSignal = new AutoResetWaitHandle("PipelineFinishedSignal");

    public void FireFinished() { _finishedSignal.Set(); }
}

public class SomeConsumer
{
    private IEnumerable<SomePipeline> _myPipelines;
    private Thread _threadWaitingForPipelines = new Thread(new ThreadStart(() =>
    {
        var _finishedSignal = new AutoResetWaitHandle("PipelineFinishedSignal");
        while(_finishedSignal.WaitOne(5000)) // waits for the signal to fire up to 5 seconds then checks it's pipelines for being finished
        {
            if (_myPipelines.All(pipeline => pipeline.Finished))
                FireAllPipelinesAreFinished();
        }
    }));
}