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为什么WebResponse在阅读twitter firehose流时永远不会结束?

以下函数将从Twitter firehose下拉第一个X消息,但看起来像WebResponse块并且永远不会退出该函数:

public void GetStatusesFromStream(string username, string password, int nMessageCount)
{
    WebRequest request = WebRequest.Create("http://stream.twitter.com/1/statuses/sample.json");
    request.Credentials = new NetworkCredential(username, password);

    using (WebResponse response = request.GetResponse())
    {
        using (var stream = response.GetResponseStream())
        {
            using (var reader = new StreamReader(stream))
            {
                while (!reader.EndOfStream)
                {
                    Console.WriteLine(reader.ReadLine());

                    if (nMessageCount-- < 0)
                        break;
                }
                Console.WriteLine("Start iDispose");
            }
            Console.WriteLine("Never gets here!!!");
        }
    }

   Console.WriteLine("Done - press a key to exit");
   Console.ReadLine();
}
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但以下工作正常:

public void GetStatusesFromStreamOK(string username, string password, int nMessageCount)
    {
    byte[] encbuff = System.Text.Encoding.UTF8.GetBytes(username …
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c# twitter webresponse

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