HttpWebRequest - receiving stream before it's completed. Should it work?

...because it works on a .Net console application. On my console app, I receive data every 10 sec (see my httphandler code, it's just a loop with Thread.Sleep(10000)). But in my SL app, it all arrives after 50 sec (once completed).

Here is the code... Same method in both apps... except for the "Console.WriteLine(..."

public void DownloadTest()
{
     string url = "http://localhost:3583/_testerweb/test.clbk";
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