POST /MyWebService/Service.asmx HTTP/1.1
Host: www.wrox.com
Content-Type: text/xml; charset=utf-8
Content-Length: 19
SOAPAction: "http://www.wrox.com/HelloWorld"

<?xml version="1.0" encoding="utf-8"?>
<soap:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
 xmlns:xsd="http://www.w3.org/2001/XMLSchema" 
 xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">
  <soap:Body>
    <HelloWorld xmlns="http://www.wrox.com/" />
  </soap:Body>
</soap:Envelope>