1. C# 1 Web services CSC 298

2. C# 2 Web services  A technology to make libraries available across the internet.  In Visual Studio,  can create a web service (a set of types that is published on the web). The computer must be able to act as a server (e.g. with IIS)  can use a web service published by some other party, e.g http://www.xmethods.net http://www.salcentral.com

3. C# 3 SOAP, WSDL and discovery  Simple universally accepted protocol to expose, find and invoke web service functions.  SOAP: Simple Object Access Protocol  based on XML, HTTP and SMTP  WSDL: Web Service Description language  XML based. A description of what a web service offers.  Other protocols: UDDI and Discovery