Spot the defect: rounding, part two

Last time I challenged you to find a value which does not round correctly using the algorithm

Math.Floor(value + 0.5)

The value which does not round correctly is the double 0.49999999999999994, which is the largest double that is smaller than 0.5. With the given algorithm this rounds up to 1.0, even though clearly 0.49999999999999994 is less than one half, and therefore should round down.

What the heck is going on here?

Spot the defect: rounding

The intention of this method is to round a double to the nearest integer. If the double is exactly half way between two integers then it rounds to the larger of the two possibilities:[1. For negative numbers, -1.5 should round to -1.0, since -1.0 is larger than -2.0; I do not mean larger in the sense of absolute magnitude. That would be characterized as “midpoint rounding away from zero”.]

static double MyRound(double d)
{
return Math.Floor(d + 0.5);
}

Is it correct? Can you find a value for which it does not give the mathematically correct value?[2. HINT: The value I’m thinking of is small.]