xml keys and value display on cosole

Question

I am trying to display xml keys and corresponding values..

I have the following code that works, but i am supposed to use XPath, XMLDocument and XmlNode.

Can someone help ? Not familiar with those:

using System;

using System.IO;

 

public class ReadXMLFile

{

public static void Main(string[] args)

{

try

{

// Create an instance of StreamReader to read from a file.

// The using statement also closes the StreamReader.

using (StreamReader sr = new StreamReader(args[0]))

{

String line;

String mkey;

String mvalue;

// reads and displays values of the file until the end of the file is reached

while ((line = sr.ReadLine()) != null)

{

mkey="";

mvalue="";

if ((line.IndexOf("key=") > 0) && (line.IndexOf("value=") > 0))

{

mkey = line.Substring(line.IndexOf("key=")+5);

mkey = mkey.Substring(0,mkey.IndexOf("\""));

mvalue = line.Substring(line.IndexOf("value=")+7);

mvalue = mvalue.Substring(0,mvalue.IndexOf("\""));

Console.WriteLine("Key={0} || Value={1}",mkey,mvalue);

 

}

 

}

Console.ReadLine();

}

}

catch (Exception e)

{

// Incase something is wrong, we should let the user know.

Console.WriteLine("The file could not be read:");

Console.WriteLine(e.Message);

}

}

}