protected override string CalculateOhmValue()
        {
            string   valueString = string.Empty;
            Resistor resistor    = FindResistor(bandColors[0]);

            if (resistor != null)
            {
                valueString += resistor.SignificantFigure >= 0 ? resistor.SignificantFigure.ToString() : "";
                resistor     = FindResistor(bandColors[1]);
                if (resistor != null)
                {
                    valueString += resistor.SignificantFigure >= 0 ? resistor.SignificantFigure.ToString() : "";
                    int value = 0;
                    if (int.TryParse(valueString, out value))
                    {
                        resistor = FindResistor(bandColors[2]);
                        if (resistor != null)
                        {
                            value    = value * (int)(resistor.MultiplierPower < 999 ? Math.Pow(10, resistor.MultiplierPower) : 0);
                            resistor = FindResistor(bandColors[3]);
                            if (resistor != null)
                            {
                                return($"{value} {resistor.Tolerance}");
                            }
                        }
                    }
                }
            }

            return(string.Empty);
        }
        private void CreateResistorTable()
        {
            Resistor resistor = new Resistor {
                MultiplierPower = 999, RingColorName = "None", SignificantFigure = -1, TemperatureCoefficient = 999, Tolerance = "\u00B1" + "20%"
            };

            resistors.Add(resistor);
            resistor = new Resistor {
                MultiplierPower = 999, RingColorName = "None", SignificantFigure = -1, TemperatureCoefficient = 999, Tolerance = "\u00B1" + "20%"
            };
            resistors.Add(resistor);
            resistor = new Resistor {
                MultiplierPower = -3, RingColorName = "Pink", SignificantFigure = -1, TemperatureCoefficient = 999, Tolerance = ""
            };
            resistors.Add(resistor);
            resistor = new Resistor {
                MultiplierPower = -2, RingColorName = "Silver", SignificantFigure = -1, TemperatureCoefficient = 999, Tolerance = "\u00B1" + "10%"
            };
            resistors.Add(resistor);
            resistor = new Resistor {
                MultiplierPower = -1, RingColorName = "Gold", SignificantFigure = -1, TemperatureCoefficient = 999, Tolerance = "\u00B1" + "5%"
            };
            resistors.Add(resistor);
            resistor = new Resistor {
                MultiplierPower = 0, RingColorName = "Black", SignificantFigure = 0, TemperatureCoefficient = 250, Tolerance = ""
            };
            resistors.Add(resistor);
            resistor = new Resistor {
                MultiplierPower = 1, RingColorName = "Brown", SignificantFigure = 1, TemperatureCoefficient = 100, Tolerance = "\u00B1" + "1%"
            };
            resistors.Add(resistor);
            resistor = new Resistor {
                MultiplierPower = 2, RingColorName = "Red", SignificantFigure = 2, TemperatureCoefficient = 50, Tolerance = "\u00B1" + "2%"
            };
            resistors.Add(resistor);
            resistor = new Resistor {
                MultiplierPower = 3, RingColorName = "Orange", SignificantFigure = 3, TemperatureCoefficient = 15, Tolerance = "\u00B1" + "0.05%"
            };
            resistors.Add(resistor);
            resistor = new Resistor {
                MultiplierPower = 4, RingColorName = "Yellow", SignificantFigure = 4, TemperatureCoefficient = 25, Tolerance = "\u00B1" + "0.02%"
            };
            resistors.Add(resistor);
            resistor = new Resistor {
                MultiplierPower = 5, RingColorName = "Green", SignificantFigure = 5, TemperatureCoefficient = 20, Tolerance = "\u00B1" + "0.5%"
            };
            resistors.Add(resistor);
            resistor = new Resistor {
                MultiplierPower = 6, RingColorName = "Blue", SignificantFigure = 6, TemperatureCoefficient = 10, Tolerance = "\u00B1" + "0.25%"
            };
            resistors.Add(resistor);
            resistor = new Resistor {
                MultiplierPower = 7, RingColorName = "Violet", SignificantFigure = 7, TemperatureCoefficient = 5, Tolerance = "\u00B1" + "0.1%"
            };
            resistors.Add(resistor);
            resistor = new Resistor {
                MultiplierPower = 8, RingColorName = "Grey", SignificantFigure = 8, TemperatureCoefficient = 1, Tolerance = "\u00B1" + "0.01%"
            };
            resistors.Add(resistor);
            resistor = new Resistor {
                MultiplierPower = 9, RingColorName = "White", SignificantFigure = 9, TemperatureCoefficient = 999, Tolerance = ""
            };
            resistors.Add(resistor);
        }