Program to read value from AppSettings section in C# using XDocument class

using System;
using System.Xml.Linq;

namespace MakeEnvVars
{
    class Program
    {
        static void Main(string[] args)
        {
              string fileName = @"D:\Web.config";
              XDocument doc = XDocument.Load(fileName);
              string message = string.Empty;
              var elements = doc.Descendants("appSettings").Descendants("add");
              foreach (XElement element in elements)
              {
                  message = $"SET {element.FirstAttribute.Value}=\"{element.LastAttribute.Value}\"";
                  Console.WriteLine(message);               
              }

            Console.ReadKey();
        }
    }
}