QW0013.md

QW0013: Use Qowaiv decimal rounding

Qowaiv decimal rounding has three core benefits:

1. Via an extension-method, the code is easier to follow.
2. It supports a lot more rounding methods.
3. It allows negative values for the amount of decimals (equivalent to multiple of ten, hundred, etc.).

Non-compliant

public void Method(decimal value)
{
    decimal floor = Math.Floor(value)
    decimal ceiling = Math.Ceiling(value)
    decimal truncate = Math.Truncate(value)
    decimal rounded = Math.Round(value, 3, MidpointRouding.ToEven);
}

Compliant

public void Method(decimal value)
{
    decimal floor = value.Round(0, DecimalRounding.Floor);
    decimal ceiling = value.Round(0, DecimalRounding.Ceiling);
    decimal truncate = value.Round(0, DecimalRounding.Truncate);
    decimal rounded = value.Round(3, DecimalRounding.ToEven);
}