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

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i getting following error when running tests using specflow:

system.formatexception: input string not in correct format.

and took me while work out why happening.

it ended being because had omitted single quotes in 1 of step definitions, example:

[then(@"something adds quantity of (.*)")]

when should have been

[then(@"something adds quantity of '(.*)'")]

note single quotes around (.*)


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