HttpWebRequests Failing on Subsequent Calls

Question

I know this is a vague question, especially since I am not providing any code, but I am developing a .Net 2.0 application, and we have a WebRequest which posts data to an in

Answer 1

This usually happens if you're not disposing the WebResponse. There's a limit applied to the number of connections from a client to the same machine, and by default it's two. The connections can be reused (or closed) if you close the WebResponse. The using statement is your friend here:

WebRequest request = [...];
// Do stuff with the request stream here (and dispose it)
using (WebResponse response = request.GetResponse())
{
    // Stuff with the response
}