private string FindRM2InDocumentName()
        {
            string fileName = Path.GetFileName(_stream.Name);
            var    rm2      = RegularExpressions.JustDigits().Match(fileName);

            return(rm2.ToString());
        }
        private string FindRM2InDocumentName()
        {
            var rm2 = RegularExpressions.JustDigits().Match(_file.Name);

            return(rm2.ToString());
        }