public virtual int[] DataSetToTest(Enum_DataSetSize par_size)
        {
            switch (par_size)
            {
            case Enum_DataSetSize.N_is20:
                return(new int[]
                       { 23, 13, 45, 63, 23, 45, 32, 2, 67, 12,
                         91, 2, 67, 24, 50, 45, 12, 78, 34, 43 });

            case Enum_DataSetSize.N_is50:
                return(new int[]
                       { 23, 13, 45, 63, 23, 45, 32, 2, 67, 12,
                         91, 2, 67, 24, 50, 45, 12, 78, 34, 43,
                         65, 23, 45, 12, 89, 48, 81, 3, 67, 77,
                         81, 12, 57, 34, 40, 55, 12, 88, 24, 53,
                         65, 23, 45, 12, 89, 48, 81, 3, 67, 77 });

            case Enum_DataSetSize.N_is100:
                return(new int[]
                       { 23, 13, 45, 63, 23, 45, 32, 2, 67, 12,
                         91, 2, 67, 24, 50, 45, 12, 78, 34, 43,
                         65, 23, 45, 12, 89, 48, 81, 3, 67, 77,
                         81, 12, 57, 34, 40, 55, 12, 88, 24, 53,
                         65, 23, 45, 12, 89, 48, 81, 3, 67, 77,
                         23, 13, 45, 63, 23, 45, 32, 2, 67, 12,
                         91, 2, 67, 24, 50, 45, 12, 78, 34, 43,
                         65, 23, 45, 12, 89, 48, 81, 3, 67, 77,
                         81, 12, 57, 34, 40, 55, 12, 88, 24, 53,
                         65, 23, 45, 12, 89, 48, 81, 3, 67, 77 });

            default: return(null);
            }
        }
        public virtual Tuple <List <int>, string> DataSetToTest_Tuple(Enum_DataSetSize par_enumSize)
        {
            //
            //Added 3/4/2020 thomas downes
            //
            System.Text.StringBuilder sbAllNumbers = new StringBuilder(300);
            List <int> obj_listNums = new List <int>();

            foreach (int intEachValue in DataSetToTest(par_enumSize))
            {
                obj_listNums.Add(intEachValue);

                sbAllNumbers.Append("  " + intEachValue.ToString());
            }

            return(Tuple.Create(obj_listNums, sbAllNumbers.ToString()));
        }