# GH_SelectionTopology enum

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

```cs
public enum GH_SelectionTopology
```

Enumerates the possible selection topologies.

## Values

| Name | Value | Description |
| --- | --- | --- |
| None | 0 | No selected objects. |
| Convex | 1 | Selection set is convex, meaning unselected objects are not sandwiched between selected objects. |
| Concave | 2 | Selection set is concave, meaning unselected objects are sandwiched between selected objects. |