Tuple.Create C# (CSharp) Method

            public static Tuple<T1, T2> Create(T1 Item1, T2 Item2)
            {
                return new Tuple<T1, T2>(Item1, Item2);
            }
    

        /// <summary>
        /// Calculate Fluctuation Index, which is defined as (Vmax-Vmin)/7, Vmax and Vmin are the maximum and minimum values in the past 7 days
        /// </summary>
        private void CalculateFluctuationIndex(List<AFAttribute> leafValueAttributes)
        {
            var timeRange = new AFTimeRange(_programStartTime.AddDays(-7), _programStartTime);
            var results = SummarizeAttributes(leafValueAttributes, attributeList =>
            {
                try
                {
                    return attributeList.Data.Summary(
                    timeRange: timeRange,
                    summaryTypes: AFSummaryTypes.Range,
                    calculationBasis: AFCalculationBasis.EventWeighted,
                    timeType: AFTimestampCalculation.Auto,
                    pagingConfig: _pagingConfig).ToList();
                }
                catch (OperationCanceledException)
                {
                    Console.WriteLine("Exception reported at CalculateFluctuationIndex : {0}", _pagingConfig.Error);
                    throw _pagingConfig.Error;
                }
            });

            var orderedResults = results
                .Select(d => d[AFSummaryTypes.Range])
                .Where(v => v.IsGood)
                .Select(v => Tuple.Create(v.Attribute.Element.Name, Convert.ToSingle(v.Value) / 7))
                .OrderBy(t => t.Item1);

            using (StreamWriter writer = new StreamWriter(FluctuationIndexReportFile + _programStartTime.ToString("_MMddyyyy_HHmm") + @".csv", true))
            {
                writer.WriteLine(@"Name, Fluctuation Index");

                foreach (var elementNameAndValue in orderedResults)
                {
                    writer.WriteLine(String.Format("{0}, {1}", elementNameAndValue.Item1, elementNameAndValue.Item2.ToString()));
                }
            }
        }