Consume an ABAP Webservice (WAS 620) from .Net

Does anybody have a simple example of how to consume an ABAP webservice on WAS 620 (R/3 4.7) from a .net web app?

For example, consume this webservice from .Net:

http://[hostname]:[port]/sap/bc/soap/wsdl11?services=Z_GET_COST_CENTERS&sap-client=030