# CollateDirection enum

Namespace: [Grasshopper2.Extensions](https://developer.rhino3d.com/api/gh2/namespace/grasshopper2.extensions.md) · Assembly: [Grasshopper2](https://developer.rhino3d.com/api/gh2/assembly/grasshopper2.md)

```cs
public enum CollateDirection
```

Enumerates the possible array element collation directions.

## Values

| Name | Value | Description |
| --- | --- | --- |
| NullsInFront | 0 | Nulls are collated at the beginning of the array. |
| NullsAtBack | 1 | Nulls are collated at the end of the array. |