WinApp C# อยากเขียนโค้ดในการถอดรหัส WinRAR ต้องเริ่มจากไหนดีครับ

void SetData10()
        {
            count += (int)Math.Pow(Program.symbol.Length, 10);
            progressBar1.Invoke(new Action(() => { progressBar1.Maximum = count; }));
            string str10 = string.Empty;
            foreach (string s1 in Program.symbol)
            {
                foreach (string s2 in Program.symbol)
                {
                    foreach (string s3 in Program.symbol)
                    {
                        foreach (string s4 in Program.symbol)
                        {
                            foreach (string s5 in Program.symbol)
                            {
                                foreach (string s6 in Program.symbol)
                                {
                                    foreach (string s7 in Program.symbol)
                                    {
                                        foreach (string s8 in Program.symbol)
                                        {
                                            foreach (string s9 in Program.symbol)
                                            {
                                                foreach (string s10 in Program.symbol)
                                                {

                                                    try
                                                    {
                                                        str10 = s1 + s2 + s3 + s4 + s5 + s6 + s7 + s8 + s9 + s10;
                                                        Program.Insert("10", str10);
                                                        num++;
                                                        this.Invoke(new Action(() => { this.Text = str10; }));
                                                        double t = DateTime.Now.TimeOfDay.TotalSeconds - startCounter;
                                                        double strt = (double)((count - num) * t / num);
                                                        str = str10; new System.Threading.Thread(SetDisplay).Start();
                                                        if (num <= progressBar1.Maximum)
                                                        {
                                                            this.progressBar1.Invoke(new Action(() => { this.progressBar1.Value = num; }));
                                                        }
                                                    }
                                                    catch { };
                                                }
                                            }
                                        }
                                    }
                                }
                            }
                        }
                    }
                }
            }
            this.Invoke(new Action(() => { this.Text = "Complete...."; }));
        }