ExcelDna.Registration.TypeConversion.ConvertToDouble C# (CSharp) Метод

        public static double ConvertToDouble(object value)
        {
            object result;
            var retVal = XlCall.TryExcel(XlCall.xlCoerce, out result, value, (int)XlType.XlTypeNumber);
            if (retVal == XlCall.XlReturn.XlReturnSuccess)
            {
                return (double)result;
            }

            // We give up.
            throw new InvalidCastException("Value " + value.ToString() + " could not be converted to Int32.");
        }