SUBTITLE EDIT: update xml display format (compare-form)

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Xml.Linq;

namespace ConsoleApp1
{
    class Program
    {
        static void Main(string[] args)
        {
            string path = @"C:\Users\lenovo\Source\Repos\subtitleedit\src\Languages";
            UpdateLanguage(path);


            Console.WriteLine("DONE");
            Console.ReadLine();
        }

        public static void UpdateLanguage(string path)
        {
            string[] files = Directory.GetFiles(path, "*.xml");

            const string oldFormat = "{1}%";
            const string newFormat = "{1:0.00}%";

            foreach (string xmlFile in files)
            {
                XDocument xdoc = null;
                bool changedHappenned = false;
                try
                {
                    xdoc = XDocument.Load(xmlFile);

                    // element name: XNumberOfDifferenceAndPercentChanged
                    // element value: "Number of differences: {0} ({1:0.00}% of words changed)"

                    // TODO: change all {1:0} to {1:0.00}

                    XElement rootElement = xdoc.Root;

                    XElement compareSubtitleElement = rootElement.Element("CompareSubtitles");

                    XElement xElement1 = compareSubtitleElement.Element("XNumberOfDifferenceAndPercentChanged");
                    XElement xElement2 = compareSubtitleElement.Element("XNumberOfDifferenceAndPercentLettersChanged");

                    // note: check for nullability because some language files may not have these elements
                    // Console.WriteLine(xElement1?.Value);
                    // Console.WriteLine(xElement2?.Value);

                    // chane format
                    if (xElement1 != null)
                    {
                        xElement1.Value = xElement1.Value.Replace(oldFormat, newFormat);
                        changedHappenned = true;
                    }

                    if (xElement1 != null)
                    {
                        xElement2.Value = xElement2.Value.Replace(oldFormat, newFormat);
                        changedHappenned = true;
                    }
                }
                catch (Exception ex)
                {
                    Console.WriteLine(ex.Message);
                }
                finally
                {
                    if (changedHappenned)
                        xdoc.Save(xmlFile);
                    // *dispose xdoc
                    xdoc = null;
                }
            }
        }

    }
}