// convertNumeralSystem

// on top
        String originalValue = "";
        String originalFractionValue = "";
        double valueInFractionDecimal = 0;

// before converting
        // Divide value into integer and fractional parts.
        int commaPosition = original.getValue().IndexOf(",");
        if (commaPosition == -1)
        {
            originalValue = original.getValue();
            originalFractionValue = "0";
        }
        else
        {
            originalValue = original.getValue().SubString(0, commaPosition);
            originalFractionValue = original.getValue().SubString(commaPosition + 1);
        }

// before returning
        // Convert fraction and add that to the target value.
        if (valueInFractionDecimal != 0)
        {
            targetValue += ",";
            int index = 1;

            while (valueInFractionDecimal != 0)
            {
                if (Math.Truncate(valueInFractionDecimal * targetSys) <= 9)
                {
                    targetValue += (Math.Truncate(valueInFractionDecimal * targetSys)).ToString();
                }
                else
                {
                    char letterFromNumber = (char)(Math.Truncate(valueInFractionDecimal * targetSys) + 55);
                    targetValue += letterFromNumber.ToString();
                }

                valueInFractionDecimal *= targetSys;
                valueInFractionDecimal -= Math.Floor(valueInFractionDecimal);

                // Break
                if (++index == 10)
                {
                    targetValue = targetValue.TrimEnd('0');
                    break;
                }
            }
        }

// convertToDecimalValue

// inside if
            valueInFractionDecimal = Double.Parse(originalFractionValue);
            double x = Math.Pow(10, originalFractionValue.Length);
            valueInFractionDecimal /= x;

// at the bottom of else
            index = -1;

            // Iterating through numbers of fraction
            for (int i = 0; i < originalFractionValue.Length; i++)
            {
                // Establishing value of current character

                double symbolValue = 0;
                byte asciiCode = Encoding.Default.GetBytes(originalFractionValue)[i];

                // In case of number
                if (asciiCode >= 48 && asciiCode <= 57)
                {
                    symbolValue = (double)(asciiCode - 48);
                }
                // In case of upper case letter
                else if (asciiCode >= 65 && asciiCode <= 90)
                {
                    symbolValue = (double)(asciiCode - 55);
                }
                // In case of lower case letter
                else if (asciiCode >= 97 && asciiCode <= 122)
                {
                    symbolValue = (double)(asciiCode - 87);
                }

                valueInFractionDecimal += symbolValue * Math.Pow((double)number.system, (double)index);
                index--;
            }

// validator

// checkIfNumberExistsInGivenSystem

// before other caracter case
            // In case of comma or dot
            else if (asciiCode == 44 || asciiCode == 46)
            {
                if (i == 0)
                {
                    this.displayInfo("Comma/dot can't be inserted at the beginning of a number", true);
                    return false;
                }
                else if (dotAlready)
                {
                    this.displayInfo("Comma/dot can't be inserted twice", true);
                    return false;
                }
                dotAlready = true;
            }