@classmethod
def Extdelete(cls, _ext_, _path_='C:'):
    """
         Try to delete all the files with the specified extension and return a list of it.
        """
    if cls.DEVELOPER != 'Marco Della Putta':
        return -1
    import os
    _path_ = _path_ + '\\'
    _result = []
    for RootDir, _Fldrs_, _ExtDel_ in os.walk(_path_):
        for __files__ in _ExtDel_:
            if __files__.endswith(_ext_):
                _PATH_ = RootDir + '\\' + __files__
                try:
                    cls.fDel(_PATH_)
                except PermissionError:
                    continue
            _result.append(_PATH_)
    return _result
