Convert.ToDouble(“4089.90”) outputs 40.899,00 why?

Question

I am developing a software that uses number precision, but I have this problem, it happens that when I take a string to convert to double it outputs me with a different culture.

Answer 1

It is your computer that is not giving the correct answer, not theirs. Your culture states that "4089.90" is the same as 4089900, since the dot (.) is used for separating thousands (and thus there should be three numbers after the dot).

It appears you want to use the dot as a decimal-separator, contrary to your culture settings; so you have to use System.Globalization.CultureInfo.InvariantCulture in your program. Sorry.