XML Web services are the next logical step in the evolution of the Internet. Teach yourself how to write and deploy XML Web services for Microsoft® .NET—one step at a time—with this modular, accessible tutorial. It delivers expert, task-based instruction plus a real-world XML service example to help you apply what you already know about Microsoft Visual C#™, Microsoft Visual Basic® .NET, and object-oriented programming so that you can learn XML Web services development at your own pace. Topics covered include: UNDERSTANDING XML WEB SERVICES XML Web services architecture XML Web services protocols Web Service Description Language (WSDL) Discovering XML Web services BUILDING XML WEB SERVICES Writing .NET XML Web services Testing XML Web services Debugging XML Web services CONSUMING XML WEB SERVICES Discovering XML Web services Generating a proxy class Creating clients that consume XML Web services Consuming XML Web services asynchronously Consuming XML Web services with HTTP ADVANCED XML WEB SERVICES Managing XML Web service state Securing XML Web services Using data sets with XML Web services Using SOAP headers