原文 - Why does Math.Round(2.5) return 2 instead of 3?
double dbl1 = Math.Round(1.5); // dbl1 == 2
double dbl2 = Math.Round(2.5); // dbl2 == 2
double dbl3 = Math.Round(2.5, 0, MidpointRounding.AwayFromZero); // dbl3 == 3
为什么 Math.Round(2.5) 返回 2
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