Plot Composition Formula

    public class FormulaElementWithoutAgeView
    {
        public short OrdinalNumber { get; set; }
        public string Stock { get; set; }
        public short Value { get; set; }
        public double Delta { get; set; }
    }



public class Utils
{

        /// <summary>
        /// Получение формула состава на делянку
        /// </summary>
        /// <param name="pineVolume">Объем сосны.</param>
        /// <param name="firVolume">Объем ели.</param>
        /// <param name="silverFirVolume">Объем пихты.</param>
        /// <param name="larchVolume">Объем лиственницы.</param>
        /// <param name="birchVolume">Объем березы.</param>
        /// <param name="aspenVolume">Объем осины.</param>
        /// <returns></returns>
        public string GetCompositionFormula(double pineVolume, double firVolume, double silverFirVolume, double larchVolume, double birchVolume, double aspenVolume)
        {
            double totalVolume = pineVolume + firVolume + silverFirVolume + larchVolume + birchVolume + aspenVolume;
            if (totalVolume == 0) return "---";
            double pinePercent = pineVolume / totalVolume * 10;
            double firPercent = firVolume / totalVolume * 10;
            double silverFirPercent = silverFirVolume / totalVolume * 10;
            double larchPercent = larchVolume / totalVolume * 10;
            double birchPercent = birchVolume / totalVolume * 10;
            double aspenPercent = aspenVolume / totalVolume * 10;

            string compositionFormula = String.Empty;
            string compositionFormulaEnd = String.Empty;
            List<FormulaElementWithoutAgeView> formula = new List<FormulaElementWithoutAgeView>();
            #region Сосна
            FormulaElementWithoutAgeView pElement = new FormulaElementWithoutAgeView();
            pElement.OrdinalNumber = 1;
            pElement.Stock = "С";
            pElement.Value = Convert.ToInt16(Math.Round(pinePercent, 0));
            pElement.Delta = pElement.Value - pinePercent;
            formula.Add(pElement);
            #endregion
            #region Ель
            FormulaElementWithoutAgeView fElement = new FormulaElementWithoutAgeView();
            fElement.OrdinalNumber = 2;
            fElement.Stock = "Е";
            fElement.Value = Convert.ToInt16(Math.Round(firPercent, 0));
            fElement.Delta = fElement.Value - firPercent;
            formula.Add(fElement);
            #endregion
            #region Пихта
            FormulaElementWithoutAgeView sfElement = new FormulaElementWithoutAgeView();
            sfElement.OrdinalNumber = 3;
            sfElement.Stock = "П";
            sfElement.Value = Convert.ToInt16(Math.Round(silverFirPercent, 0));
            sfElement.Delta = sfElement.Value - silverFirPercent;
            formula.Add(sfElement);
            #endregion
            #region Лиственница
            FormulaElementWithoutAgeView lElement = new FormulaElementWithoutAgeView();
            lElement.OrdinalNumber = 4;
            lElement.Stock = "Л";
            lElement.Value = Convert.ToInt16(Math.Round(larchPercent, 0));
            lElement.Delta = lElement.Value - larchPercent;
            formula.Add(lElement);
            #endregion
            #region Береза
            FormulaElementWithoutAgeView bElement = new FormulaElementWithoutAgeView();
            bElement.OrdinalNumber = 5;
            bElement.Stock = "Б";
            bElement.Value = Convert.ToInt16(Math.Round(birchPercent, 0));
            bElement.Delta = bElement.Value - birchPercent;
            formula.Add(bElement);
            #endregion
            #region Осина
            FormulaElementWithoutAgeView aElement = new FormulaElementWithoutAgeView();
            aElement.OrdinalNumber = 6;
            aElement.Stock = "Ос";
            aElement.Value = Convert.ToInt16(Math.Round(aspenPercent, 0));
            aElement.Delta = aElement.Value - aspenPercent;
            formula.Add(aElement);
            #endregion

            //Балансировка значений
            if (formula.Sum(x => x.Value) != 10)
            {
                switch (formula.Sum(x => x.Value))
                {
                    case 11:
                        formula = formula.Where(x => x.Value != 0).ToList();
                        formula.OrderBy(x => x.Delta);
                        formula[formula.Count - 1].Value -= 1;
                        break;
                    case 9:
                        formula.OrderBy(x => x.Delta);
                        formula[0].Value += 1;
                        break;
                }
            }

            //Составление формулы
            for (int i = 1; i <= 6; i++)
            {
                FormulaElementWithoutAgeView fe = formula.Where(x => x.OrdinalNumber == i).FirstOrDefault();
                if (fe == null) continue;
                if (fe.Value != 0) compositionFormula += String.Format("{0}{1}", fe.Value, fe.Stock);
                else
                {
                    if (fe.Delta < 0 && fe.Delta >= -0.3) compositionFormulaEnd += String.Format("+ед.{0}", fe.Stock);
                    else if (fe.Delta != 0) compositionFormulaEnd += String.Format("+{0}", fe.Stock);
                }
            }
            return compositionFormula + compositionFormulaEnd;
        }
}