# GH_Group 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_Group : GH_DocumentObject, IGH_InstanceGuidDependent
```

Represents a group of Grasshopper objects.

## Constructors

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

## Properties

- [Border](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.special.gh-group/border.md): Gets or sets the border style of the group object.
- [Colour](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.special.gh-group/colour.md): Gets or sets the colour of this group.
- [ComponentGuid](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.special.gh-group/componentguid.md)
- [EditMode](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.special.gh-group/editmode.md): Gets or sets a value indicating whether or not this group is currently in Edit mode. Edit Mode is currently not functional, but in future releases it is supposed to become a state where objects can be removed from/added to a group.
- [Exposure](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.special.gh-group/exposure.md)
- [GroupID](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.special.gh-group/groupid.md): (static) Defines the ID for group objects.
- [Icon](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.special.gh-group/icon.md)
- [ObjectIDs](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.special.gh-group/objectids.md): Gets the list of all object IDs that are contained in this group.

## Methods

- [AddObject](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.special.gh-group/addobject.md): Add a new object to this group. The ID must represent a top-level object in the document that owns this group.
- [AppendMenuItems](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.special.gh-group/appendmenuitems.md)
- [ContentBoxes](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.special.gh-group/contentboxes.md): Recursively gets the boxes of the group content. If the group contains another group with a border style = Blob, the child group boxes will also be included.
- [CreateAttributes](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.special.gh-group/createattributes.md)
- [ExpireCaches](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.special.gh-group/expirecaches.md): Expire all display and instance caches. Call this function whenever you change the group.
- [InstanceGuidsChanged](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.special.gh-group/instanceguidschanged.md): Whenever the InstanceIDs of objects were changed, the group needs to be informed.
- [Objects](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.special.gh-group/objects.md): Gets the actual objects contained within this group. The instance cache will be rebuild if it doesn't exist.
- [ObjectsRecursive](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.special.gh-group/objectsrecursive.md): Gets the objects contained in this group and all subgroups.
- [Read](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.special.gh-group/read.md)
- [RemoveObject](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.special.gh-group/removeobject.md): Remove an object from this group.
- [Write](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.special.gh-group/write.md)

## Inherited Members

- From [GH_DocumentObject](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.gh-documentobject.md): [m_attributes](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.gh-documentobject/m-attributes.md), [Attributes](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.gh-documentobject/attributes.md), [IconDisplayMode](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.gh-documentobject/icondisplaymode.md), [Icon_24x24](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.gh-documentobject/icon-24x24.md), [Icon_24x24_Locked](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.gh-documentobject/icon-24x24-locked.md), [Internal_Icon_24x24](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.gh-documentobject/internal-icon-24x24.md), [Obsolete](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.gh-documentobject/obsolete.md), [AttributesChanged](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.gh-documentobject/attributeschanged.md), [DisplayExpired](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.gh-documentobject/displayexpired.md), [ObjectChanged](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.gh-documentobject/objectchanged.md), [PingDocument](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.gh-documentobject/pingdocument.md), [PreviewExpired](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.gh-documentobject/previewexpired.md), [SolutionExpired](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.gh-documentobject/solutionexpired.md), [AddedToDocument](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.gh-documentobject/addedtodocument.md), [DestroyIconCache](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.gh-documentobject/destroyiconcache.md), [DocumentContextChanged](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.gh-documentobject/documentcontextchanged.md), [ExpirePreview](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.gh-documentobject/expirepreview.md), [ExpireSolution](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.gh-documentobject/expiresolution.md), [GetValue](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.gh-documentobject/getvalue.md), [HtmlHelp_Source](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.gh-documentobject/htmlhelp-source.md), [IsolateObject](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.gh-documentobject/isolateobject.md), [Menu_AppendObjectHelp](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.gh-documentobject/menu-appendobjecthelp.md), [Menu_AppendObjectName](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.gh-documentobject/menu-appendobjectname.md), [Menu_AppendObjectNameEx](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.gh-documentobject/menu-appendobjectnameex.md), [Menu_AppendPublish](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.gh-documentobject/menu-appendpublish.md), [MovedBetweenDocuments](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.gh-documentobject/movedbetweendocuments.md), [OnAttributesChanged](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.gh-documentobject/onattributeschanged.md), [OnDisplayExpired](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.gh-documentobject/ondisplayexpired.md), [OnObjectChanged](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.gh-documentobject/onobjectchanged.md), [OnPingDocument](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.gh-documentobject/onpingdocument.md), [OnPreviewExpired](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.gh-documentobject/onpreviewexpired.md), [OnSolutionExpired](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.gh-documentobject/onsolutionexpired.md), [RecordUndoEvent](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.gh-documentobject/recordundoevent.md), [RemovedFromDocument](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.gh-documentobject/removedfromdocument.md), [SetIconOverride](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.gh-documentobject/seticonoverride.md), [SetValue](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.gh-documentobject/setvalue.md), [TriggerAutoSave](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.gh-documentobject/triggerautosave.md), [ValuesChanged](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.gh-documentobject/valueschanged.md)
- From [GH_InstanceDescription](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.gh-instancedescription.md): [Category](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.gh-instancedescription/category.md), [Description](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.gh-instancedescription/description.md), [HasCategory](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.gh-instancedescription/hascategory.md), [HasSubCategory](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.gh-instancedescription/hassubcategory.md), [InstanceDescription](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.gh-instancedescription/instancedescription.md), [InstanceGuid](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.gh-instancedescription/instanceguid.md), [Keywords](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.gh-instancedescription/keywords.md), [Name](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.gh-instancedescription/name.md), [NickName](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.gh-instancedescription/nickname.md), [SubCategory](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.gh-instancedescription/subcategory.md), [CopyFrom](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.gh-instancedescription/copyfrom.md), [NewInstanceGuid](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.gh-instancedescription/newinstanceguid.md), [ReadFull](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.gh-instancedescription/readfull.md), [WriteFull](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.gh-instancedescription/writefull.md)