Question

I have a line like the following in my code:

string buffer = string.Format(CultureInfo.InvariantCulture, "{0:N4}", 1008.0);

Why does buffer contain 1,008.0 (note comma) after executing this line?

Yes, I do guess that it’s caused by my regional settings. The question is why they affect the result in this case?

EDIT:

Ok, I understand that it’s completely my fault. It seems like I should have used F format specifier.

Answer 1

The InvariantCulture is loosely based on en-US which uses , as a thousands (group) separator.

Your result is what I would expect.

I also point you to the details of the N numeric format specifier:

The numeric (“N”) format specifier converts a number to a string of the form “-d,ddd,ddd.ddd…”, where “-” indicates a negative number symbol if required, “d” indicates a digit (0-9), “,” indicates a group separator, and “.” indicates a decimal point symbol.