string zip_name = ini_param.StartPath + @"\in_txt.zip";

 byte[] ImageData = File.ReadAllBytes(zip_name);

 OracleParameter oracleParameter = new OracleParameter();
 oracleParameter.ParameterName = "BODYXML";
 oracleParameter.OracleType = OracleType.Blob;
 oracleParameter.Direction = ParameterDirection.Input;
 oracleParameter.Size = ImageData.Length;
 oracleParameter.Value = ImageData;
 command.Parameters.Add(oracleParameter);

    string zip_name = ini_param.StartPath + @"\out_txt.zip";

    OracleLob blob = rdr.GetOracleLob(14);
    byte[] buffer = new byte[blob.Length];

    File.WriteAllBytes(zip_name, buffer);

blob.Read(buffer, 0, buffer.Length);

using(var fs=new FileStream(ini_param.StartPath + @"\out_txt.zip", ...))
	rdr.GetOracleLob(14).CopyTo(fs);