C# Math.Round实现中国式四舍五入

decimal sum = 11111.334;

sum = decimal.Round(sum, 2 , MidpointRounding.AwayFromZero); 

sum：11111.33decimal sum = 11111.345;

sum = decimal.Round(sum, 2 , MidpointRounding.AwayFromZero); 

sum ：11111.35