Lets say I have a value of 3.4679 and want 3.46, how can I truncate to two decimal places that without rounding up?

I have tried the following but all three give me 3.47:

void Main() { Console.Write(Math.Round(3.4679, 2,MidpointRounding.ToEven)); Console.Write(Math.Round(3.4679, 2,MidpointRounding.AwayFromZero)); Console.Write(Math.Round(3.4679, 2)); }

This returns 3.46, but just seems dirty some how:

void Main() { Console.Write(Math.Round(3.46799999999 -.005 , 2)); }

## Answer

value = Math.Truncate(100 * value) / 100;

Beware that fractions like these cannot be accurately represented in floating point.