private void opnBtn_Click(object sender, EventArgs e)
        {
            string oldPath;

            OpenFileDialog fdlg = new OpenFileDialog();

            fdlg.InitialDirectory = @"H:\";
            fdlg.Filter = "All files (*.*), |*.*";
            fdlg.FilterIndex = 2;
            fdlg.RestoreDirectory = true;

            if (fdlg.ShowDialog() == DialogResult.OK)
            {
                oldPath = fdlg.FileName;
                string backSlashSch = "\\";
                string backSlashPos = oldPath.Substring(0,    oldPath.LastIndexOf("\\") + 1);

                int backPos = oldPath.LastIndexOf(backSlashSch);

                int endOfPath = oldPath.Length;
                int calcPos = (endOfPath - backPos - 1);
                string newPath = oldPath.Insert(calcPos, "1");


                MessageBox.Show(oldPath);
                MessageBox.Show(backSlashPos);
                MessageBox.Show(backPos.ToString());
                MessageBox.Show(endOfPath.ToString());
                MessageBox.Show(calcPos.ToString());
                MessageBox.Show(newPath);

                pathDsp.Text= (oldPath + "      " + backSlashPos + "     " + backSlashPos + "     " + endOfPath + "     " + calcPos + "     " + newPath);
                
            }

            

            
        }