C # manipulating XML

usingSystem;usingSystem.Collections.Generic;usingSystem.Linq;usingSystem.Text;usingSystem.Net;usingSystem.Threading.Tasks;usingSystem.Xml;usingSystem.IO;namespaceconsoleapplication1{/// <summary>    ///XML Operation Classes/// </summary>     Public classProgram {/// <summary>        ///Entrance Method/// </summary>        /// <param name= "args" >parameter list</param>         Public Static voidMain (string[] args) {            stringFilepath="Cars.xml";            Createxmlfile (FilePath);            Readxmlfile (FilePath);            Modifyxmlfile (FilePath);        Deletexmlnode (FilePath); }        /// <summary>        ///Create an XML file/// </summary>        /// <param name= "FilePath" >file path</param>         Public Static voidCreatexmlfile (stringFilePath) {            //01. Declaration XmlDocumentXmlDocument doc =NewXmlDocument (); //02. Adding head declarations to themXmlDeclaration declaration = doc. Createxmldeclaration ("1.0","Utf-8",""); Doc.            AppendChild (declaration); //03. Adding a child node to itXmlElement root = Doc. CreateElement ("Cars"); Root. SetAttribute ("ID","10001");//adding attributes to a node//add Mercedes Car infoXmlElement Benz = Doc. CreateElement ("Benz"); XmlElement Benzname= Doc. CreateElement ("Name"); Benzname.innertext="Mercedes";//InnerTextBenz.            AppendChild (Benzname); XmlElement Benzmaxspeed= Doc. CreateElement ("maxspeed"); Benzmaxspeed.innertext=" -"; Benz.            AppendChild (Benzmaxspeed); Root.            AppendChild (Benz); //add BMW car infoXmlElement BMW = Doc. CreateElement ("BMW"); bmw. INNERXML="<Name> BMW </Name><MaxSpeed>299</MaxSpeed>";//InnerXmlRoot.            AppendChild (BMW); //04. Save the fileDoc.            AppendChild (root); Doc.        Save (FilePath); }        /// <summary>        ///reading an XML file/// </summary>        /// <param name= "FilePath" >file path</param>         Public Static voidReadxmlfile (stringFilePath) {            //First Method: Use XmlDocument.Load ()            if(File.exists (FilePath)) {//01. Loading an XML documentXmlDocument doc =NewXmlDocument (); Doc.                Load (FilePath); //02. Read the root node and child nodesXmlNode root = Doc. selectSingleNode ("Cars"); if(Root. HasChildNodes) {XmlNodeList xnd=Root.                    ChildNodes; foreach(XmlNode xninchxnd) {XmlElement XE=(XmlElement) xn; Console.WriteLine (xn.                    INNERXML); }                }            }            //second method: Use Xmldocument.loadxml ()            if(File.exists (FilePath)) {using(StreamReader sr =NewStreamReader (FilePath)) {                    stringXmlstr =Sr.                    ReadToEnd (); XmlDocument Doc=NewXmlDocument (); Doc.                     LOADXML (XMLSTR); //The following code is the same as above                }            }            //the difference between Load () and Loadxml () is://The former is loaded into the XML document//The latter loads the XML string        }        /// <summary>        ///Modifying XML Document Information/// </summary>        /// <param name= "FilePath" >Document Path</param>         Public Static voidModifyxmlfile (stringFilePath) {            if(File.exists (FilePath)) {//01. Loading an XML documentXmlDocument doc =NewXmlDocument (); Doc.                Load (FilePath); XmlElement Root= (XmlElement) doc. selectSingleNode ("Cars"); //02. Modifying Attribute InformationRoot. SetAttribute ("ID","998"); //03. Modify the node informationXmlNode bwnmaxspeed = (XmlElement) doc. selectSingleNode ("Cars/bmw/maxspeed"); Bwnmaxspeed.innertext="319"; //04. Save the documentDoc. Save ("Mcar.xml"); }        }        /// <summary>        ///Delete node or attribute information/// </summary>        /// <param name= "FilePath" >XML Document Path</param>         Public Static voidDeletexmlnode (stringFilePath) {            if(File.exists (FilePath)) {//01. Loading DocumentsXmlDocument doc =NewXmlDocument (); Doc.                Load (FilePath); XmlElement Root= (XmlElement) doc. selectSingleNode ("Cars"); //02. Delete Attribute Information                if(Root. Hasattribute ("ID") {root. RemoveAttribute ("ID"); }                //03. Delete Node InformationXmlNodeList Xnd =Root.                ChildNodes; foreach(XmlNode xninchxnd) {XmlNode Subxn=xn.                    FirstChild; if(Subxn.innertext = ="BMW") {root.                    RemoveChild (xn); }                }                //04. Save ChangesDoc. Save ("Dcar.xml"); }        }    }}

C # manipulating XML