使用自定义方法扩展svcutil.exe和wsdl.exe

I really need to add some of my own convenience methods into the auto-generated proxy files that are output by wsdl.exe and svcutil.exe. What I am doing is adding another type of ***Operation***Async method for each service method. I would like to be able to invoke a tool from a command line like this:I really need to add some of my own convenience