# Keys

> A collection of all the unique variable names.

## Definition

* **Type:** Property
* **Namespace:** [Unity.SmartStrings.PersistentVariables](/engine/6000.7/script-reference/unity/smartstrings/persistentvariables.md)
* **Assembly:** UnityEngine.SmartStringsModule

```csharp
public ICollection<string> Keys { get; }
```