Development Class C#

//http://isotopescreencapture.codeplex.com/
//The MIT License (MIT)
namespace Isotope.Math
{
    public static class MathUtil
    {
        public static double Round(double val, double snap_val)
        {
            return Round(val, System.MidpointRounding.AwayFromZero, snap_val);
        }
        /// 
        /// rounds val to the nearest fractional value 
        /// 

        /// the value tp round
        /// what kind of rounding
        ///  round to this value (must be greater than 0.0)
        /// the rounded value
        public static double Round(double val, System.MidpointRounding rounding, double frac)
        {
            /*
            if (frac <= 0)
            {
                throw new ArgumentOutOfRangeException("frac","must be greater than or equal to 0.0");
            }*/
            double retval = System.Math.Round((val/frac), rounding)*frac;
            return retval;
        }
        public static double RoundUp(double v, double amount)
        {
            const System.MidpointRounding rounding = System.MidpointRounding.ToEven;
            var result = Round(v + (amount/2.0), rounding, amount);
            return result;
        }
   }
}