# isValid

> Returns true is the hash value is valid. (Read Only)

## Definition

* **Type:** Property
* **Namespace:** [UnityEngine](/engine/6000.6/script-reference/unityengine.md)
* **Assembly:** UnityEngine.CoreModule

```csharp
public bool isValid { get; }
```

### Remarks

A hash value with all 128 bits being zero is considered invalid.