c# RoundUp函数

工作需要，写了一个，RoundDown和Round有时间再补上。

private static decimal RoundUp(decimal val, int decPoint)
{
    bool flagMinus = false;
    if (val < 0)
    {
        val = -val;
        flagMinus = true;
    }

    decimal newVal = Math.Round(val, decPoint);
    decimal difference = val - newVal;
    if (difference > 0)
    {
        decimal padding = 1 / (decimal)(Math.Pow(10, decPoint));
        newVal += padding;
    }
    if (flagMinus)
        return newVal * -1;
    else
        return newVal;
}