SpecFlow: System.FormatException: Input string was not in a correct format

Question

I was getting the following error when running my tests using SpecFlow:

System.FormatException: Input string was not in a correct format.

And it took me a while to work out why it was happening.

Answer 1

It ended up being because I had omitted the single quotes in one of my step definitions, for example:

[Then(@"Something adds up to a quantity of (.*)")]

when it should have been

[Then(@"Something adds up to a quantity of '(.*)'")]

Note the single quotes around (.*)