.NET HttpClient Warning

httpclient-warning.cs

void Main()
{
    using(var stream = File.Open(@"D:\test.txt", FileMode.Open))
    using(var httpClient = new HttpClient())
    {
        stream.Dump();
        var httpContent = new StreamContent(stream);
    
        // pretty sweet test server by Henry Cipolla
        // http://henrycipollablog.com/2011/12/06/testing-multipartform-data-uploads-with-post-test-server/
        var result = httpClient.PostAsync("http://posttestserver.com/post.php?dir=httpclient-test", httpContent).Result;
        stream.Dump(); // stream closed
    }    
}