Adf.Base.Messaging.CsvMessageHandler.ReadRecordField C# (CSharp) Method

        protected virtual void ReadRecordField(DictionaryState state, TableDescriber table, FieldDefinition fieldDefinition, string[] fields)
        {
            if (fieldDefinition.StartPosition >= fields.Length)
            {
                if (fieldDefinition.IsOptional) return;
                throw new MessagingException("Message does not match definition. Too few fields in current record.");
            }

            if (fields[fieldDefinition.StartPosition].StartsWith("\"") && fields[fieldDefinition.StartPosition].EndsWith("\"")) // Remove quotes
            {
                fields[fieldDefinition.StartPosition] = fields[fieldDefinition.StartPosition].Substring(1, fields[fieldDefinition.StartPosition].Length - 2);
            }

            var describer = new ColumnDescriber(fieldDefinition.Name, table);

            if (fieldDefinition.Type.IsIn(FieldDefinitionType.DateTime))
            {
                state[describer] = DateTime.ParseExact(fields[fieldDefinition.StartPosition].Trim('"'), fieldDefinition.Format, CultureInfo.InvariantCulture);
            }
            else if (fieldDefinition.Type.IsIn(FieldDefinitionType.Amount, FieldDefinitionType.InvertedAmount, FieldDefinitionType.Decimal))
            {
                object oldvalue;

                decimal oldAmount = state.TryGetValue(describer, out oldvalue) && oldvalue is decimal
                                        ? (decimal) oldvalue
                                        : 0;

                decimal amount = !string.IsNullOrWhiteSpace(fields[fieldDefinition.StartPosition].Trim('"'))
                            ? Decimal.Parse(fields[fieldDefinition.StartPosition].Trim('"'),
                                fieldDefinition.Format.IsNullOrEmpty() ? CultureInfo.InvariantCulture : new CultureInfo(fieldDefinition.Format))
                            : 0;

                if (fieldDefinition.Type == FieldDefinitionType.InvertedAmount) amount *= -1;

                state[describer] = oldAmount + amount;
            }
            else if (fieldDefinition.Type == FieldDefinitionType.AmountSign)
            {
                if (IsNegativeAmountSign(fields[fieldDefinition.StartPosition], fieldDefinition))
                {
                    state[describer] = Decimal.Negate(((decimal)state[describer]));
                }
            }
            else
            {
                object oldvalue;
                state[describer] = state.TryGetValue(describer, out oldvalue)
                                       ? oldvalue + " " + fields[fieldDefinition.StartPosition]
                                       : fields[fieldDefinition.StartPosition];
            }
        }