# TryAdd(in HierarchyNode, in T)

> Attempts to add the specified HierarchyNode and value to the HierarchyNodeMapUnmanaged<T>.

## Definition

* **Type:** Method
* **Namespace:** [Unity.Hierarchy](/engine/6000.6/script-reference/unity/hierarchy.md)
* **Assembly:** UnityEngine.HierarchyCoreModule

## TryAdd(HierarchyNode, T)

```csharp
public bool TryAdd(in HierarchyNode node, in T value)
```

### Parameters

**** (\[HierarchyNode]\(/engine/6000.6/script-reference/unity/hierarchy/hierarchynode)): The hierarchy node.**** (T): The value.

### Returns

| Type                                                          | Description                                                                                                                                                                                                                                                    |
| ------------------------------------------------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| [bool](https://learn.microsoft.com/dotnet/api/system.boolean) | `true` if the [HierarchyNode](/engine/6000.6/script-reference/unity/hierarchy/hierarchynode.md)/value pair was added to the [HierarchyNodeMapUnmanaged\<T>](/engine/6000.6/script-reference/unity/hierarchy/hierarchynodemapunmanaged1.md), `false` otherwise. |