C# WinApp อยากรู้การใส่ parameter ใน ตัวแปรที่เป็น object ครับว่าเราจะรู้ได้ยังไงว่าต้องใส่อะไรบ้าง

private void CheckFile(object obj)
        {
            string s_E = ""; string t_E = "";
            string Fol_EMK;
            int _sngEMK = 0;
            string FolderCode = (string)((object[])obj)[0];
            int min = (int)((object[])obj)[1];
            int max = (int)((object[])obj)[2];
            Fol_EMK = PathKARA + "\\Songs\\MIDI\\EMK\\" + FolderCode;
            MIDI_Dll.MIDI_Dll.CreatePath(Fol_EMK);

            int i = min;
            while (true)
            {

                s_E = list[i].ToLower();
                do
                {
                    t_E = Fol_EMK + "\\" + FolderCode + string.Format("{0:00000}", _sngEMK) + ".emk";
                    _sngEMK++;
                } while (System.IO.File.Exists(t_E));

                

                try
                {

                   System.IO.File.Move(s_E, t_E);
                    if (sngRun > 0)
                    {
                        double t = DateTime.Now.TimeOfDay.TotalSeconds - startCounter;
                        double strt = (double)((list.Count - sngRun) * t / sngRun);
                        this.lblEMKDetail.Invoke(new Action(() =>
                        {

                            this.lblEMKDetail.Text =
                                "Check File: " + s_E + " to " + t_E + Environment.NewLine +
                                "File: " + sngRun + "/" + (list.Count - 1) + Environment.NewLine +
                                "Completion Ratio:" + string.Format("{0:0.0000}", Convert.ToDouble(100 * (double)sngRun / (double)(list.Count - 1))) + " %" + Environment.NewLine +
                                "Speed:" + string.Format("{0:0.00}", ((double)sngRun / t)) + "file/s" + Environment.NewLine +
                                "Elapsed time:" + MIDI_Dll.MIDI_Dll.Time(t) + Environment.NewLine +
                                "Remaining time:" + MIDI_Dll.MIDI_Dll.Time(strt);

                        }));
                    }

                    this.progressBar2.Invoke(new Action(() => { this.progressBar2.Value = sngRun; }));
                }
                catch { }
                sngRun++;
                System.Threading.Thread.Sleep(10);
                i++;
                if (i > max + 1 || i > list.Count)
                {
                    { return; }
                }
            }
        }
    }

for (int i = 0; i <  maxThread; i++)
            { //ตัวอย่าการใช้งาน CheckFile
                new System.Threading.Thread(CheckFile).Start(new object[] { Convert.ToChar(65 + i).ToString(), i * sngPer, (i + 1) * sngPer });
            }

private void CheckFile(object obj)

new System.Threading.Thread(CheckFile).Start(new object[] { Convert.ToChar(65 + i).ToString(), i * sngPer, (i + 1) * sngPer });