Round to even cents

I did a coding assignment one of these days that needed me to round a given price to the nearest even cent. Though the requirement was a bit odd, it became interesting when I realized that the built-in rounding methods in .Net were not sufficient.

10.346 has to round to 10.34
10.356 has to round to 10.36

I wrote the following method to implement this:

        public static decimal RoundToEvenCents(decimal sourceNumber)

        {

            var tempNumber = sourceNumber * 100;

            var lowerValue = Math.Floor(tempNumber);

            var upperValue = Math.Ceiling(tempNumber);

            var evenValue = (lowerValue % 2 == 0) ? lowerValue : upperValue;

            return evenValue / 100;

        }

Though I am not sure if this is a valid business requirement, putting it here just in case somebody needs it.