EncryptionAlgorithms.Fraction.ToFraction C# (CSharp) Method

        public static Fraction ToFraction(double dValue)
        {
            try
            {
                checked
                {
                    Fraction frac;
                    if (dValue % 1 == 0)	// if whole number
                    {
                        frac = new Fraction((long)dValue);
                    }
                    else
                    {
                        double dTemp = dValue;
                        long iMultiple = 1;
                        string strTemp = dValue.ToString();
                        while (strTemp.IndexOf("E") > 0)	// if in the form like 12E-9
                        {
                            dTemp *= 10;
                            iMultiple *= 10;
                            strTemp = dTemp.ToString();
                        }
                        int i = 0;
                        while (strTemp[i] != '.')
                            i++;
                        int iDigitsAfterDecimal = strTemp.Length - i - 1;
                        while (iDigitsAfterDecimal > 0)
                        {
                            dTemp *= 10;
                            iMultiple *= 10;
                            iDigitsAfterDecimal--;
                        }
                        frac = new Fraction((int)Math.Round(dTemp), iMultiple);
                    }
                    return frac;
                }
            }
            catch (OverflowException)
            {
                throw new FractionException("Conversion not possible due to overflow");
            }
            catch (Exception)
            {
                throw new FractionException("Conversion not possible");
            }
        }