C# WinApp เอา function เปลี่ยนชื่อไฟล์มาฝาก ยังไม่สมบูรณ์ครับอยากให้ช่วยปรับปรุงหน่อย

public static void ReplaceFileName(string Path, string Cri, System.Collections.Generic.List<string> lst, bool chngformFolder = false, bool delformFolder = false, string strFnt = "", string strBck = "", bool msg = true)
        {
            new System.Threading.Thread(ReplaceFileName) { IsBackground = true }.Start(new object[] { Path, Cri, lst, chngformFolder, delformFolder, strFnt, strBck, msg });
        }
public static void ReplaceFileName(object obj)
         {
             DateTime d1 = DateTime.Now;
            string path = (string)((object[])obj)[0];
            string Exp = (((string)((object[])obj)[1]).Trim().Length <= 0) ? "*.*" : "*" + (string)((object[])obj)[1] + "*";
            System.Collections.Generic.List<string> strReplace = (System.Collections.Generic.List<string>)((object[])obj)[2];
            bool  chngformFolder= (bool)((object[])obj)[3];
            bool delformFolder = (bool)((object[])obj)[4];
            string strFnt = (string)((object[])obj)[5];
            string strBck = (string)((object[])obj)[6];
            bool msg = (bool)((object[])obj)[7];
            
            System.Collections.Generic.Stack<string> stack = new System.Collections.Generic.Stack<string>();
            stack.Push(path);
            
            while ((stack.Count > 0))
            {
                string dir = stack.Pop();
                foreach (string file in   System.IO.Directory.GetFiles(dir, Exp))
                {
                    string _file = System.IO.Path.GetFileNameWithoutExtension(file);
                    foreach(string str in strReplace)
                    {
                        _file = _file.Replace(str, "").Trim();
                    }
                    _file = (chngformFolder != true) ? _file :System.IO.Path.GetFileName(System.IO.Path.GetDirectoryName(file)) + "_" + _file;
                    _file = (strFnt.Trim().Length <= 0) ? _file : strFnt.Trim() + _file;
                    _file = (strBck.Trim().Length <= 0) ? _file : _file + strBck.Trim();
                    _file = (delformFolder != true) ? _file : _file.Replace(System.IO.Path.GetFileName(System.IO.Path.GetDirectoryName(file)), "");
                    _file = System.IO.Path.GetDirectoryName(file) + "\\" + _file + System.IO.Path.GetExtension(file);
                    if (System.IO.File.Exists(_file))
                    {
                        string stg;
                        int i = 1;
                        do
                        {
                            stg = System.IO.Path.GetDirectoryName(_file) + "\\" + System.IO.Path.GetFileNameWithoutExtension(_file) + "_" + i + System.IO.Path.GetExtension(_file);
                            i++;
                        } while (System.IO.File.Exists(stg));
                        _file = stg;
                    }
                    try
                    {System.IO.File.Move(file, _file); }
                    catch {}
                    System.Threading.Thread.Sleep(10);

                }
                string directoryName = null;
                
                foreach (string directoryName_loopVariable in System.IO.Directory.GetDirectories(dir))
                {
                    directoryName = directoryName_loopVariable;
                    stack.Push(directoryName);
                }
                System.Threading.Thread.Sleep(10);
            }
            DateTime d2 = DateTime.Now;
            TimeSpan dd = (d2-d1);
            if (msg == true) { MessageBox.Show("Complete...\n Time: " + dd.TotalSeconds.ToString("0.000") + " s" ); }
        }