这是正确的方法吗？

...................................................
WebRequest req = WebRequest.Create(myWebServiceURL);
 
req.Method = "POST";
eq.ContentType = "application/x-www-form-urlencoded";
 
string postData = whateverDataneedsToBePosted;
 
using ( Stream reqStream = req.GetRequestStream() )
      {
            reqStream.Write( new ASCIIEncoding().GetBytes( postData ),postData.Length );
            reqStream.Close();
       }
 WebResponse resp = req.GetResponse();

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更新：我确实有一堆非Microsoft技术Web服务(没有asnx或svc).上述方法对于那些类型的服务是否足够好？