An exception of type 'System.Net.WebException' occurred in System.dll but was not handled in user code.
using code: 
                using (Stream stream = request.GetRequestStream())
                {
                    SOAPReqBody.Save(stream);
                }
                //Geting response from request  
                using (WebResponse Serviceres = request.GetResponse())
 
Please give me suggestion for sove this error.