decimal SUM = 123231.012121M;
Sum = Math.Round(Sum, 2, MidpointRounding.AwayFromZero);//保留2位小数
string Sums = String.Format("{0:N2}", Sum);//千分位
C#千分位并保留2位小数位
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转载自blog.csdn.net/qq_36459934/article/details/88555103
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