System.Runtime.Serialization.EnumDataContract.EnumDataContract.ReadEnumValue C# (CSharp) Method

        internal object ReadEnumValue(XmlReaderDelegator reader)
        {
            string stringValue = reader.ReadElementContentAsString();
            long longValue = 0;
            int i = 0;
            if (IsFlags)
            {
                // Skip initial spaces
                for (; i < stringValue.Length; i++)
                    if (stringValue[i] != ' ')
                        break;

                // Read space-delimited values
                int startIndex = i;
                int count = 0;
                for (; i < stringValue.Length; i++)
                {
                    if (stringValue[i] == ' ')
                    {
                        count = i - startIndex;
                        if (count > 0)
                            longValue |= ReadEnumValue(stringValue, startIndex, count);
                        for (++i; i < stringValue.Length; i++)
                            if (stringValue[i] != ' ')
                                break;
                        startIndex = i;
                        if (i == stringValue.Length)
                            break;
                    }
                }
                count = i - startIndex;
                if (count > 0)
                    longValue |= ReadEnumValue(stringValue, startIndex, count);
            }
            else
            {
                if (stringValue.Length == 0)
                    throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(XmlObjectSerializer.CreateSerializationException(SR.Format(SR.InvalidEnumValueOnRead, stringValue, DataContract.GetClrTypeFullName(UnderlyingType))));
                longValue = ReadEnumValue(stringValue, 0, stringValue.Length);
            }

            if (IsULong)
                return Enum.ToObject(UnderlyingType, (object)(ulong)longValue);
            return Enum.ToObject(UnderlyingType, (object)longValue);
        }