What doing SoapHttpClientProtocol in webservices

What doi开发者_运维问答ng SoapHttpClientProtocol in webservices?what is difference between proxy class and SoapHttpClientProtocol?

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You can find details here (just scroll down to the Remarks section):

...When the XML Web service client calls using SOAP, the proxy class must derive from SoapHttpClientProtocol, which derives from HttpWebClientProtocol. HttpWebClientProtocol, in turn, derives from WebClientProtocol...