public void EncryptFolder(string folder_path)
        {
            var dfm  = new DirManager();
            var dirs = DirManager.GetFoldersRecursive(folder_path);

            foreach (var subDir in dirs)
            {
                dfm.ChooseDir(subDir);
                dfm.EncryptDir();
            }
        }
        public void EncryptFolder(String folder_path)
        {
            DirManager    dfm  = new DirManager();
            List <String> dirs = DirManager.GetFoldersRecursive(folder_path);

            foreach (String subDir in dirs)
            {
                dfm.ChooseDir(subDir);
                dfm.EncryptDir();
            }
        }