Specify Expect100Continue=false in Web Service client.

The Web Service Provider that we are using recommends NOT send Expect100Continue header.
The specifying static value
is not good, because some other providers may prefer to use the header.
In the haacked’s “HttpWebRequest and the Expect: 100-continue Header Problem” post   comment of Mirronelli Jun 02, 2005 6:22 AM  suggest to specify webRequest.ServicePoint.Expect100Continue = false; for  each webRequest.

 If I am using web service(derived from SoapHttpClientProtocol) I can use ServicePointManager Class FindServicePoint method. 

Uri uri=new Uri(xws.Url);
ServicePoint servicePoint = ServicePointManager.FindServicePoint(uri);
// Debug.Assert(servicePoint.Expect100Continue == false, “Investigate why not?.”);
if (servicePoint.Expect100Continue == true)
{ //should happen only once for each URL
   servicePoint.Expect100Continue =