# GH_MarkupCollection class

Namespace: [Grasshopper.Kernel.Special](https://developer.rhino3d.com/api/gh1/namespace/grasshopper.kernel.special.md) · Assembly: [Grasshopper](https://developer.rhino3d.com/api/gh1/assembly/grasshopper.md)

```cs
public class GH_MarkupCollection : IEnumerable<Polyline>
```

Maintains a managed list of Polyline marks.

## Constructors

- [GH_MarkupCollection](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.special.gh-markupcollection/ctor.md)

## Properties

- [BoundingBox](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.special.gh-markupcollection/boundingbox.md)
- [Count](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.special.gh-markupcollection/count.md)

## Indexers

- [Item](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.special.gh-markupcollection/item.md)

## Methods

- [Add](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.special.gh-markupcollection/add.md)
- [Clear](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.special.gh-markupcollection/clear.md)
- [GetEnumerator](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.special.gh-markupcollection/getenumerator.md)
- [GetEnumerator1](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.special.gh-markupcollection/getenumerator1.md)
- [ToGraphicsPath](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.special.gh-markupcollection/tographicspath.md)
- [Transform](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.special.gh-markupcollection/transform.md)