# uniqueIdentifiers Field
A hash set storing unique identifiers for events intended to only be emitted once.
## Definition
**Namespace:** CapyKit
**Assembly:** CapyKit (in CapyKit.dll) Version: 1.0.2
**C#**
``` C#
private static HashSet uniqueIdentifiers
```
**F#**
``` F#
static val mutable private uniqueIdentifiers: HashSet
```
#### Field Value
HashSet(String)
## See Also
#### Reference
CapyEventReporter Class
CapyKit Namespace
EmitEventOnce(EventLevel, String, String, String, Object[])