# MetaDataList class

Namespace: [Grasshopper2.Data.Meta](https://developer.rhino3d.com/api/gh2/namespace/grasshopper2.data.meta.md) · Assembly: [Grasshopper2](https://developer.rhino3d.com/api/gh2/assembly/grasshopper2.md)

```cs
public sealed class MetaDataList
```

A list of unique metadata instances.

## Constructors

- [MetaDataList](https://developer.rhino3d.com/api/gh2/type/grasshopper2.data.meta.metadatalist/ctor.md)

## Properties

- [Count](https://developer.rhino3d.com/api/gh2/type/grasshopper2.data.meta.metadatalist/count.md): Gets the number of items in this collection.

## Indexers

- [this[]](https://developer.rhino3d.com/api/gh2/type/grasshopper2.data.meta.metadatalist/item.md): Gets the item at the given index.

## Methods

- [Add](https://developer.rhino3d.com/api/gh2/type/grasshopper2.data.meta.metadatalist/add.md): Add a new metadata value to this collection.
- [IndexOf](https://developer.rhino3d.com/api/gh2/type/grasshopper2.data.meta.metadatalist/indexof.md): Find the index of meta data in this collection which equals the given data.
- [ToArray](https://developer.rhino3d.com/api/gh2/type/grasshopper2.data.meta.metadatalist/toarray.md): Create an array out of this collection.