Please give me some ideas about below issue
Write a polling service that looks for a named GDFF file in a given directory. It reads the file in as a stream, validates against the flat file schema, counts the bytes and publishes the value and validity to the broker. Set this up in the scheduler to run every business day at 3 PM for next 3 years, excepting in the month of May.
Where are these task descriptions coming from? They sound suspiciously like training or certification activities.
Writing a polling service without using IS seems like an awfully strange request–I think you will need/want to use IS.
Question looks pretty much like an assignment or a certification .
in short , schedule a service as specified which looks for a file in the given directory and gets the data and does validation .