You cannot get a "simple code" in response to such a vague request. It really depends on the detail of what you want to achieve and your service.
However, one thing is obvious: your Web Service application provides some interface to the client application. Your console application is no different from such client application. Your service can be SOAP or JSON based, RESTful or not, WCF based, and so on. It all defines what the client should do.
For basic ideas, please see:
http://en.wikipedia.org/wiki/Web_service[
^].
But ultimately, learn about the particular Service you are going to use consume.
—SA