Microsoft .NET introduces a new suite of XML APIs built on industry standards such as DOM, XPath, XSD, and XSLT. The .NET Framework XML classes also offer convenience, better performance, and a more familiar programming model, tightly coupled with the new .NET data access APIs—ADO .NET. XmlWriter, XmlReader, and XmlNavigator classes and classes that derive from them, including XMLTextReader and XMLTextWriter, encapsulate a number of functionalities that previously had to be accomplished manually. This tutorial will show you a sample of how to operate XML in ASP.NET and VB.NET.
The System.Xml namespace contains the XmlDocument Class .we can use this class to operate xml file.