c# - double minus double giving precision problems

Question

I have come across a precision issue with double in .NET I thought this only applied to floats but now I see that double is a float.

double test = 278.97 - 90.46;
Debug.WriteLine(test) //188.51000000000005

//correct answer is 188.51

What is the correct way to handle this? Round? Lop off the unneeded decimal places?

Answer 1

Use the decimal data type. "The Decimal value type is appropriate for financial calculations requiring large numbers of significant integral and fractional digits and no round-off errors."