如何使用扩展.aspx创建 Web 服务以及如何使用它

我必须从以.aspx结尾的Web服务发送并获得响应。 我使用了HTTP发布方法。这是最好的方法吗？如何等待网络服务响应？ 为了发送和获得响应，我使用以下代码。但是我无法测试它，因为我没有网络服务。

WebRequest _request = WebRequest.Create("https://somewebsite.com/webservices/XMLInbound.aspx");
_request.Method = "POST";
XElement xele = new XElement("RAFeed");//Substitute here with XML File that is created with all the parameters
byte[] bytearray = Encoding.UTF8.GetBytes(xele.ToString());
_request.ContentType = "application/x-www-form-urlencoded";
_request.ContentLength = bytearray.Length;
_request.Timeout = 5000;// Here i wait for the response is the correct way ?
//Gets the request as a stream
Stream datastream = _request.GetRequestStream();
datastream.Write(bytearray, 0, bytearray.Length);
datastream.Close();
//Gets Response
WebResponse response = _request.GetResponse();
//// Display the status.
//Debug.WriteLine(((HttpWebResponse)response).StatusDescription);          
datastream = response.GetResponseStream();
StreamReader reader = new StreamReader(datastream);
string responseFromServer = reader.ReadToEnd();//Response is in this string            
reader.Close();
datastream.Close();
response.Close();
var Rdoc = new XmlDocument();
Rdoc.LoadXml(responseFromServer);