Read XML to obtain the contents of the associated XML document. Set XML to specify the XML document you want to examine or manipulate. Once XML is set, you can activate the XML document and examine or manipulate it using the DocumentElement property. 

XML is a TStrings object. This means you can supply a value using the Strings editor at design time, or manipulate the XML line by line at runtime. To read or write the XML in the document as a single string, use the LoadFromXML or SaveToXML method. 

FileName 

LoadFromXML 

SaveToXML 

DocumentElement 

Using TXMLDocument 

Using Code That the XML Data Binding Wizard Generates