# IsValidNonDefaultHandle(in AtomicSafetyHandle)

> Checks if an AtomicSafetyHandle has been initialized and is valid.

## Definition

* **Type:** Method
* **Namespace:** [Unity.Collections.LowLevel.Unsafe](/engine/6000.7/script-reference/unity/collections/lowlevel/unsafe.md)
* **Assembly:** UnityEngine.ManagedKernelModule

## IsValidNonDefaultHandle(AtomicSafetyHandle)

```csharp
public static bool IsValidNonDefaultHandle(in AtomicSafetyHandle handle)
```

### Parameters

**** (\[AtomicSafetyHandle]\(/engine/6000.7/script-reference/unity/collections/lowlevel/unsafe/atomicsafetyhandle)): The AtomicSafetyHandle to check.

### Returns

| Type                                                          | Description                                                                            |
| ------------------------------------------------------------- | -------------------------------------------------------------------------------------- |
| [bool](https://learn.microsoft.com/dotnet/api/system.boolean) | `true` if the AtomicSafetyHandle has been initialized and is valid; `false` otherwise. |