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Using the XPathNavigator for Navigating Xml Documents

<%@ Import Namespace="System" %> <%@ Import Namespace="System.Xml" %> <%@ Import Namespace="System.Xml.XPath" %> <%@ Page Language="C#" %> <script runat="server">     private void Page_Load(Object Source, EventArgs E)     {         StringBuilder sb = new StringBuilder();         String space2 = "&nbsp;&nbsp;";         String space3 = "&nbsp;&nbsp;&nbsp;";              XmlDocument _XmlDoc = new XmlDocument();         _XmlDoc.Load(Server.MapPath("Data.xml"));              XPathNavigator _Nav;         _Nav = _XmlDoc.CreateNavigator();              _Nav.MoveToRoot();         sb.Append("<B>Root: </B>");         sb.Append("name=" + _Nav.Name + ", type=" + _Nav.NodeType.ToString());         sb.Append("<BR/><BR/>");                  _Nav.MoveToFirstChild();         sb.Append("name=" + _Nav.Name + ", type=" + _Nav.NodeType.ToString());         sb.Append("<BR/>");                  _Nav.MoveToFirstChild();         do          {             sb.Append(space2);             sb.Append("name=" + _Nav.Name + ", type=" + _Nav.NodeType.ToString());             sb.Append("<BR/>");                      _Nav.MoveToFirstAttribute();             sb.Append(space2);             sb.Append("Attribute: " + _Nav.Name + "=" + _Nav.Value);             sb.Append("<BR/>");                      _Nav.MoveToParent();                      _Nav.MoveToFirstChild();             do             {                 sb.Append(space3);                 sb.Append("name=" + _Nav.Name + ", type=" + _Nav.NodeType.ToString() + ", value=" + _Nav.Value);                 sb.Append("<BR/>");             }while(_Nav.MoveToNext());                      _Nav.MoveToParent();          }while(_Nav.MoveToNext());                  OutputLiteral.Text = sb.ToString();     }              </script> <html> <head> <title>Using the XPathNavigator for Navigating Xml Documents</title> </head> <body>     <form runat="server">         <!-- Insert content here -->         <asp:Literal id="OutputLiteral" runat="server"></asp:Literal>     </form> </body> </html> File: Data.xml <?xml version="1.0" encoding="utf-8" ?> <users>   <user role="admin">     <username>jsmith</username>     <password>john</password>   </user>   <user role="operator">     <username>tcruise</username>     <password>tom</password>   </user> </users>