Using a class and class Data to Genereate XML

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C#

XML

WPF

IO

XmlReader

Hi all,

i have some doubts in creating xml from a class that i have. I need to grenerate a xml file in my local filesystem the Nodes and Data of a xml should be Generated once from the first time. What ever changed made in the data should be saved in the genereated XML in my local file system using the logic some thing as below.

XmlDocument doc = new XmlDocument();
           doc.LoadXml("<item><name>wrench</name></item>");

           // Add a price element.
           XmlElement newElem = doc.CreateElement("price");
           newElem.InnerText = "10.95";
           doc.DocumentElement.AppendChild(newElem);

           // Save the document to a file. White space is
           // preserved (no white space).
           doc.PreserveWhitespace = true;

           doc.Save("" + Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments) + "\\" + UserPrincipal.Current.DisplayName.Replace(' ', '_') + ".xml");

The above example is what i got from MSDN which works fine. what i need is in the LoadXML or using some other method i need to create a XML Using my Custom Class.