Long Block Statement

  if (romanNumber.Length == 1)
        {
            indexOfCurrentSymbol = 0;
            while ((romanNumber.Substring(0, 1) != RomanNumerals[indexOfCurrentSymbol]))
            {
                indexOfCurrentSymbol++;
            }
            arabicNumber = DecimalValuesOfRomanNumerals[indexOfCurrentSymbol];
            return arabicNumber;
        }
        else
        {
            indexOfCurrentSymbol = 0;
            while ((romanNumber.Substring(romanNumber.Length-1, 1) !=
                RomanNumerals[indexOfCurrentSymbol]))
            {
                indexOfCurrentSymbol++;
            }
            arabicNumber = DecimalValuesOfRomanNumerals[indexOfCurrentSymbol];

            for (int i = 1; i < romanNumber.Length; i++)
            {
                indexOfCurrentSymbol = 0;
                indexOfPreviousSymbol = 0;


                while ((romanNumber.Substring(i, 1) !=
                    RomanNumerals[indexOfCurrentSymbol]))
                {
                    indexOfCurrentSymbol++;
                }
                while ((romanNumber.Substring(i -1, 1) !=
                    RomanNumerals[indexOfPreviousSymbol]))
                {
                    indexOfPreviousSymbol++;
                }
                if (indexOfCurrentSymbol > indexOfPreviousSymbol)
                {
                    arabicNumber -= DecimalValuesOfRomanNumerals[indexOfPreviousSymbol];
                }
                else
                {
                    arabicNumber += DecimalValuesOfRomanNumerals[indexOfPreviousSymbol];
                }
            }
            return arabicNumber;
        }