Roles of XML in asp.net

IN ADO.NET Basics

Microsoft ADO.NET is the latest improvement after ADO. ADO.NET provides platform interoperability and scalable data access. In the .NET Framework, data is transmitted in the Extensible Markup Language (XML) format. Therefore, any application that can read the XML format can process data. 

IN Web Configuration settings:

The application-level configuration settings are stored in an Extensible Markup Language (XML) format. The XML format is a hierarchical text format, which is easy to read and write. This format makes it easy to apply new settings to applications without the aid of any local administration tools.

IN SECURITY

Through the XML format we can easily define the security for the administrator. we can easily read, write and modify the authentication and authorization concepts according to the administrator

IN WEB SERVICES

Web service is a programmable URL. Stated another way, a Web service is an application component that is remotely callable using standard Internet protocols such as HTTP and XML.XML is the best way to transfer the data in different interface through the concept of COM and DOM. Thus, any system that supports these basic, standard protocols is capable of supporting Web services.