This question already has an answer here:
double.Parse throw a System.FormatException
I am having this kind of error:
Input string was not in a correct format
Looking from debug I can see that this is the line that is causing the error:
double num = Math.Round(double.Parse(value), 4);
I have made some researches but my piece of code looks like is correct, so I am still not getting where I am doing wrong.