How to Convert .xlsx file to Text File with Delimitor as | using c#

Hi ,
I have a Excelsheet called "sample.xlsx", in this excel I have two sheets name sheet1& sheet2.below is the data in sheet1 and sheet2.
Sheet 1 Data:-
Id Name City 1 testing1 Kurnool 2 testing2 Bangalore Sheet2 Data:-
id State Country 1 AP India ...