WCF Services

Windows Communication Foundation (WCF)

WCF is a messaging framework for building distributed systems. Distributed systems is mostly just another word for web services.
The WCF programming model provides various capabilities, such as SOAP services, REST services, web HTTP services, data services, rich internet application (RIA) services, and workflow services.

This is a wrapper over svcutil.exe
It creates client proxies and also web.config entries.
All communications with a WCF Service occur through endpoints.
Each endpoint contains the following information:
Address - where to find the service (represented by the EndPointAddress class). Every endpoint must have a unique address.
Binding - how the communication is performed
Contract - specifies which operations are available
These must be added using the Service Reference

link - http://dneonline.com/calculator.asmx?wsdl