c# - print double with digits after decimal point

Question

How can I customize a function in which I print doubles? I would like this function to get number of digits after the decimal point (comma in my locale) as an agrument and then print, for example, pi with the number of digits after comma specified by user.

Answer 1

var digits = 4;
var myDouble = Math.PI;

var formattedValue = myDouble.ToString("N" + digits.ToString(),
    CultureInfo.CurrentCulture);