使用PushStreamContent的Self Hosted Web Api可以处理多个请求吗？

Question

我使用HttpSelfHostServer来托管我的WebApi。我像这样返回一个PushStreamContent

        public HttpResponseMessage Get(HttpRequestMessage request)
        {
            var response = request.CreateResponse();
            response.Content = new PushStreamContent(OnStreamAvailable, "text/eventstream");
            return response;
        }

在我向我的api发出第二次请求之前，Everthing正在按预期工作。第一个请求是阻止，第二个请求无法到达Get-function，直到我关闭第一个请求。

我已按此设置我的配置

            HttpSelfHostConfiguration config = new HttpSelfHostConfiguration(_baseAddress);
            config.TransferMode = System.ServiceModel.TransferMode.Streamed;
            config.MaxConcurrentRequests = 10;

为什么第一个电话会阻止第二个电话？

修改： 这是我完整的控制器：

    public class PushController : ApiController
    {
        private static readonly ConcurrentBag<StreamWriter> _Writers = new ConcurrentBag<StreamWriter>();


        public HttpResponseMessage Get(HttpRequestMessage request)
        {
            var response = request.CreateResponse();
            response.Headers.Add("Access-Control-Allow-Origin", "*");
            response.Headers.Add("Cache-Control", "no-cache, must-revalidate");
            response.Content = new PushStreamContent(OnStreamAvailable, "text/event-stream");
            return response;
        }

        private void OnStreamAvailable(Stream stream, HttpContent content, TransportContext context)
        {
            _Writers.Add(new StreamWriter(stream) { AutoFlush = true });
        }

        public static void Say(string text)
        {
            try
            {
                foreach (var w in _Writers)
                {
                    w.Write("data:{ text : \"" + text + "\" }\n\n");
                }
            }
            catch { }
        }
    }