Showing status in c# loop using the modulus operator (%)

I needed to take some records in one file, do some stuff with the record, then put the results in another file. The ‘do stuff’ part was taking a bit longer than I thought it would so I wanted to see status. This sample illustrates taking 1000 records from a source file, uppercasing each line, putting it in another file, and letting us know every 100 lines.