• The webserver handling a request receives the request coded in some way.
• When providing a Web Service we do not provide code to decode the HTTP request.
• For example, we do not have to parse the XML if the third mechanism is being used.
• Similarly, we do not need to generate the XML of the reply.
• So, when providing a Web Service, we need not be concerned about this: ...
• ... all the hard work of decoding the request and encoding the reply is done elsewhere for us.
• Similarly, when we are providing a client of a Web Service, we do not have to write code that generates the HTTP request with a body coded in SOAP, ...
• ... and we do not have to write the code to parse the XML that gets returned by the Web Service: ...
• ... instead, all of that is done by the call of Invoke that appears in the body of each method of the proxy class, e.g.:

  0100:             object[] results = this.Invoke("ToFahrenheit", new object[]{pCentigrade});