为什么Math.Round（106.8，2，MidpointRounding.AwayFromZero）返回106.8而不是106.80？

Question

I need the number returned to have exactly 2 decimal points but I can't seem to get this to work.

Is this something built into C# ?

I also tried setting the number to a double and a decimal and I get the same answer both times.

price = Math.Round(106.8, 2, MidpointRounding.AwayFromZero);

Answer 1

Floating-point values 106.8d and 106.80d are totally the same. Use .ToString() or string.Format() to represent them as strings with desired formatting.