how to get google excel sheet id at runtime

Question

Hi ,

I am working "Create And Update Google SpreadSheet Via Google API.NET Library" help of

https://www.c-sharpcorner.com/article/create-and-update-google-spreadsheet-via-google-api-net-library/

tutorial.

but in this tutoral excel sheet id is fix, thats by my hole data upload in single sheet, but i want evey time when i downlod the data its write in diffent sheet. please guide me.please