[Overview][Constants][Types][Classes][Procedures and functions][Variables] | Reference for unit 'Classes' (#fcl)

# TDuplicates

Type to describe what to do with duplicate values in a TStringlist.

## Declaration

`type TDuplicates = (`
`dupIgnore,` |  | Duplicate values will not be be added to the list, but no error will be triggered.
`dupAccept,` |  | Duplicate values can be added to the list.
`dupError` |  | If an attempt is made to add a duplicate value to the list, an EStringListError exception is raised.
`);`