NumberFormatInfo.NumberDecimalDigits changes nothing

[Dennis Myrén]

Hi.

I use a System.Globalization.NumberFormatInfo
(a System.IFormatProvider derival) instance for formatting numbers.

I want to use the NumberDecimalDigits member property to round the numbers
when formatting them as strings. However, this property does not seem to
help me.
For example:
NumberFormatInfo numberFormat = new NumberFormatInfo();

numberFormat.NumberDecimalDigits = 2;

double d = 1.53075794227797E-14;

string s = string.Format(numberFormat, "d = {0}", d);

Console.WriteLine(s);

Shouldn't this example produce a number with two decimals? In this case, it
does not.

It keeps all decimals.

I know i could use a rounding function like Math.Round to manually round the
numbers.

But in some way, it should be possible to use only a NumberFormatInfo
instance to do the job, shouldn't it?

Regards,

Dennis