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

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

            // Not sure how this can happen...
            throw new InvalidCastException("Value " + value.ToString() + " could not be converted to String.");
        }