internal override BaseDistribution InnerGetDifference(BaseDistribution value)
        {
            switch (value.InnerDistributionType)
            {
            case DistributionType.Number:
            {
                return(Mean - value.InnerMean);
            }

            case DistributionType.Continious:
            {
                return(ContinuousRandomMath.Sub(Mean, (ContinuousDistribution)value));
            }

            case DistributionType.Discrete:
            {
                return(DiscreteRandomMath.Sub(Mean, (DiscreteDistribution)value));
            }

            default:
            {
                throw new DistributionsInvalidOperationException();
            }
            }
        }
        internal override BaseDistribution InnerGetDifference(BaseDistribution value)
        {
            switch (value.InnerDistributionType)
            {
            case DistributionType.Continious:
            {
                return(this + (value * -1));
            }

            case DistributionType.Discrete:
            {
                return(Discretize() - value);
            }

            case DistributionType.Number:
            {
                return(ContinuousRandomMath.Sub(this, (double)value));
            }

            default:
                throw new DistributionsInvalidOperationException();
            }
        }