need help with this error

I am relatively new to c#. I am working from a book for this project and have come across the following error message when I run the console application.

"An unhandled exception of type 'System.FormatException' occurred in mscorlib.dll"

"Additional information: Input string was not in a correct format."

I have checked for typos in the code several times and found nothing.

Can anyone help with this?

re: need help with this error

I was able to figure out what the problem was. I found a typo somewhere else in the code. Correcting this fixed the problem.

re: need help with this error

Well done!