C#同/异步委托使用和调用，请指教

public delegate void GetResultEventHandler(object sender, bool IsSucceed, string DataResults);
public event GetResultEventHandler OnGetInfoCompleted;
public void GetPostHtmlResults(string GetURL, int GetTimeOut)
{
HttpWebRequest request = HttpWebRequest.CreateHttp(GetURL);
request.Method = "GET";
request.ContinueTimeout = GetTimeOut;
request.BeginGetResponse(GetInfoCompleted, request);
}
private void GetInfoCompleted(IAsyncResult asyncResult)
{
try
{
HttpWebRequest webRequest = asyncResult.AsyncState as HttpWebRequest;
HttpWebResponse webResponse = (HttpWebResponse)webRequest.EndGetResponse(asyncResult);
Stream streamResult = webResponse.GetResponseStream();
StreamReader reader = new StreamReader(streamResult, Encoding.UTF8);
if (OnGetInfoCompleted != null)
OnGetInfoCompleted(this, true, reader.ReadToEnd());
}
catch (WebException ex)
{
OnGetInfoCompleted(this, false, ex.Message.ToString());
}
}
请问这个同/异步委托对不对，还有怎样调用它，谢谢！

从语法上说没什么问题，但是你本身GetResponseStream是同步的，所以包装成异步的没有实际意义。