Coupling Overture to UML Code

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;

namespace Replace
{
    class Program
    {
        static void Main(string[] args)
        {
            try
            {
                var dir = new FileInfo(args[0]); //new DirectoryInfo(System.Environment.CurrentDirectory);
                int id = 0;
                string name;
                string newDir = "replaced";
                string[] replaceTags = {"EAID", "EAPK"};
                var f= dir;
                //foreach (FileInfo f in dir.GetFiles())
                {
                    if (f.Extension == ".xml" || f.Extension == ".uml")
                    {
                        id = 0;
                       // dir.CreateSubdirectory(newDir);
                        name = Path.Combine(f.Directory.FullName,"replaced"+f.Name);//, Path.Combine(Path.Combine(f.DirectoryName, newDir), f.Name);
                        StreamReader r = f.OpenText();
                        string s = r.ReadToEnd();
                        foreach (string str in replaceTags)
                        {
                            while (s.Contains(str))
                            {
                                id++;
                                int start = s.IndexOf(str);
                                int end = s.IndexOf('"', start);
                                int end2 = s.IndexOf(' ', start);

                                if (end < end2)
                                {
                                    string sub = s.Substring(start, end - start);
                                    s = s.Replace(sub, "VDM." + id);
                                }
                                else
                                {
                                    string sub = s.Substring(start, end2 - start);
                                    s = s.Replace(sub, "VDM." + id);
                                }


                            }
                        }

                        FileStream file = new FileStream(name, FileMode.Create);
                        StreamWriter sw = new StreamWriter(file);
                        sw.Write(s);
                        sw.Close();
                    }
                }
            }
            catch
                (Exception
                    e)
            {
                Console.WriteLine(e.Message);
            }
        }
    }
}