using System;

using System.Linq;

using System.Collections.Generic;

using System.Xml.Linq;

public class Program

{

    public static void Main()

    {

        var doc = XDocument.Load("https://prod.aws.platts.com/commodityinsights/plattscontent/en/our-methodology/glossary/glossary.xml");

        var items = doc.Descendants("items").Descendants("item");

        var list = new List<KeyValuePair<string, string>>();

        foreach (XElement item in items)

            list.Add(KeyValuePair.Create(GetValue(item.Element("itemTitle")), GetValue(item.Element("itemDescription"))));

        list = list.OrderBy(x => x.Key).ToList();

        Console.Write(Newtonsoft.Json.JsonConvert.SerializeObject(list));

        //JSON

    }

    public static string GetValue(XElement element)

    {

       return (element?.HasElements ?? false ? string.Join("", element.Nodes()) : element?.Value).Trim();

    }

}