http://www.youtube.com/watch?v=mKjvKPlb1rA SOAP Web Services 01 - Introduction To Web Services
https://www.youtube.com/watch?v=GzN1vHWlJjA WCF Services - How to create a simple WCF Service - Part 1
SOAP Web Services 01 - Introduction To Web Services
0. terminology
WSDL: Web Services Description Language
in XML format
UDDI: Universal Description Discovery and Integration
is a directory service where businesses can register and search for Web services.
SOAP: Simple Object Access protocol
SEI: Service Endpoint Interface
1. create wcf service
（1）create a solution in visual studio
（2）add -》 new project -》WCF Service Application
（3）in this project : add -> new item-> WCF service