Using ASP.NET Web Services
This topic pertains to a legacy technology. XML Web services and XML Web service clients should now be created using Windows Communication Foundation.
Web services are components on a Web server that a client application can call by making HTTP requests across the Web. ASP.NET enables you to create custom Web services or to use built-in application services, and to call these services from any client application. We suggest the following progression of documentation to help you navigate through the related topics.
Creating and using Web services
Creating and using Web services in AJAX
Using application services in AJAX
Using application services as WCF services