Math.Round在AwayFromZero模式下失败

Question

Could someone tell me what is going wrong with following piece of code? It returns 0.14 instead of 0.15

Math.Round(0.145, 2, MidpointRounding.AwayFromZero)

Answer 1

If the decimals are important use decimal datatype.

There are books up and down on this subject and it's important to read up on this. But the short version is this.

var a = Math.Round(0.145, 2, MidpointRounding.AwayFromZero);
//a == 0.14
var b = Math.Round(0.145m, 2, MidpointRounding.AwayFromZero);
//b == 0.15

So you just need to declare your variable as decimal.