Question

How can I use HttpWebRequest (.NET, C#) asynchronously?

Answer 1

Use HttpWebRequest.BeginGetResponse()

HttpWebRequest webRequest;  void StartWebRequest() {     webRequest.BeginGetResponse(new AsyncCallback(FinishWebRequest), null); }  void FinishWebRequest(IAsyncResult result) {     webRequest.EndGetResponse(result); } 

The callback function is called when the asynchronous operation is complete. You need to at least call EndGetResponse() from this function.