Send multiple WebRequest in Parallel.For

I want to send multiple WebRequest. I used a Parallel.开发者_StackOverflow社区For loop to do that but the loop runs once and the second time it gives error while getting response.

Error:

The operation has timed out

Code :

Parallel.For(0, 10, delegate(int i) {
    HttpWebRequest request = (HttpWebRequest)WebRequest.Create(
        new Uri("http://www.mysite.com/service"));

    string dataToSend = "Data";
    byte[] buffer = System.Text.Encoding.GetEncoding(1252).
        GetBytes(dataToSend);
    request.Method = "POST";
    request.ContentType = "application/x-www-form-urlencoded";
    request.ContentLength = buffer.Length;

    request.Host = "www.mysite.com";

    Stream requestStream = request.GetRequestStream();
    requestStream.Write(buffer, 0, buffer.Length);
    requestStream.Close();

    HttpWebResponse response = (HttpWebResponse)request.GetResponse();
});

Most likely the problem is that you need to call response.Close() after you're done processing the response.

In addition to what Jim Mischel said about calling Close on the response, you also need to factor in that, by default, .NET limits an application to only two active HTTP connections per domain at once. To change this you can set System.Net.ServicePointManager.DefaultConnectionLimit programmatically or set the same thing via config using the <system.net><connectionManagement> configuration section.