C # manipulating XML

Example: adding and deleting and checking

usingSystem;usingSystem.Collections.Generic;usingSystem.Text;usingSystem.Xml;namespaceconsoleapp1{ Public classXmlhelper { Public voidAdd () {XmlDocument doc=NewXmlDocument (); Doc. Load ("Xmlfile1.xml"); varRoot =Doc.            DocumentElement; varNewNode = doc. CreateNode ("element","Student",""); varNewnode1 = doc. CreateNode ("element","Sno",""); Newnode1. InnerText="4"; varNewnode2 = doc. CreateNode ("element","sname",""); Newnode2. InnerText="Jackie Chan"; NewNode.            AppendChild (NEWNODE1); NewNode.            AppendChild (NEWNODE2); Root.            AppendChild (NewNode); Doc. Save ("Xmlfile1.xml"); }         Public voidDelete () {XmlDocument doc=NewXmlDocument (); Doc. Load ("Xmlfile1.xml"); varRoot =Doc.            DocumentElement; Root. RemoveChild (Root.                        FirstChild); Doc. Save ("Xmlfile1.xml"); }         Public voidUpdate () {XmlDocument doc=NewXmlDocument (); Doc. Load ("Xmlfile1.xml"); varRoot =Doc.            DocumentElement; varFirst =Root.            Firstchild.firstchild; First. InnerText="fffffffffff"; Doc. Save ("Xmlfile1.xml"); }         Public voidgetnodes () {XmlDocument doc=NewXmlDocument (); Doc. Load ("Xmlfile1.xml"); varRoot =Doc.            DocumentElement; varfind = root. childnodes[1].            InnerText;        Console.WriteLine (find); }         Public voidGetonenodebyname () {XmlDocument doc=NewXmlDocument (); Doc. Load ("Xmlfile1.xml"); varRoot =Doc.            DocumentElement; foreach(XmlElement IteminchRoot. ChildNodes) {if(item. Firstchild.innertext = ="4"{Console.WriteLine (item).                OuterXml); }            }        }    }}

C # manipulating XML