RealtimeAnalysis.FormPRM.GetExactAnalysisSeriesRM_SumOfTwo C# (CSharp) Method

        private Series GetExactAnalysisSeriesRM_SumOfTwo(DataTable dt1, DataTable dt2, string title)
        {
            double period_min = Math.Min(Get_Pmin(dt1), Get_Pmin(dt2));

            Series series = new Series(title);
            series.ChartArea = "ChartArea1";
            series.ChartType = SeriesChartType.Line;
            series.Legend = "Legend1";
            
            double minimum = double.MaxValue;
            for (double i = _incrementUnit; i <= period_min; i += _incrementUnit)
            {
                double ems = GetTheLeastThetaForGivenPi_RM(dt1, i, _overhead);
                double tms = GetTheLeastThetaForGivenPi_RM(dt2, i, _overhead);
                double sum = (ems + tms) / i;
                
                if (minimum > sum)
                {
                    SetMinimumValues(i, ems, tms);

                    minimum = sum;
                }

                series.Points.Add(new DataPoint(i, sum));
            }

            return series;
        }
        private Series GetExactAnalysisSeriesRM_SumOfTwo(DataTable dt1, DataTable dt2, string title, double csOverhead)