private static void VerifyCombined(string fileName)
        {
            CAdESCOM.CadesSignedData signedData = new CAdESCOM.CadesSignedData();

            try
            {              
                string fileData = LoadFile(fileName);
                if (!string.IsNullOrEmpty(fileData))
                {
                    signedData.VerifyCades(fileData, CAdESCOM.CADESCOM_CADES_TYPE.CADESCOM_CADES_BES, false);
                    string result = signedData.Content;

                    string resultFileName = fileName.Substring(0, fileName.LastIndexOf(".sig"));

                    using (StreamWriter writer = new StreamWriter(resultFileName))
                    {
                        writer.Write(result);
                    }
                }
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.Message);
            }
        }

        private static string LoadFile(string fileName)
        {
            string result = null;

            if (File.Exists(fileName))
            {
                using (StreamReader reader = new StreamReader(fileName))
                {
                    result = reader.ReadToEnd();
                }
            }

            return result;
        }

signedData.ContentEncoding = CAdESCOM.CADESCOM_CONTENT_ENCODING_TYPE.CADESCOM_BASE64_TO_BINARY;